Panoramic Pacific views in this 3BR/3BA Tamarindo condo, walking distance from the beach and downtown restaurants. Swim-up pool bar on-site. Fully equipped kitchen, veranda dining, king + queen + twin bedrooms, each with en-suite bath and AC. Complimentary concierge included: surf lessons, private chef, airport transfers, sailing charters. Sleeps 6. Your Pura Vida itinerary starts here!
The Space:
This condo features an open-concept living area with a fully equipped kitchen, a two-seater breakfast bar, and a dining table for six. The living room boasts a full wall of windows, providing stunning ocean views as you relax on two comfortable couches while enjoying the smart TV. Step outside to the veranda, which offers additional dining for four and extra seating to fully appreciate the breathtaking views.
The master bedroom features a king-size bed, while the additional bedrooms include one with a queen-size bed and another with two single beds. Each bedroom comes with its own en-suite bathroom and stunning ocean views.
Book your dream vacation today!
Luxury linens and bedding, towels, soaps, and air conditioning are provided, ensuring all the essentials for a comfortable stay.
Bedroom 1: 1 king bed with en-suite bathroom
Bedroom 2: 1 queen bed with en-suite bathroom
Bedroom 3: 2 single beds with en-suite bathroom
• Featured amenities at Matapalo 501 include:
• Wifi speed: 100+ Mbps
• Cable TV and Flat Screen TV
• Large lagoon pool with swim-up bar
• Beach chairs and cooler
• Air conditioning in every room
We also offer complimentary concierge services! Upon booking, you’ll receive a personal KRAIN concierge to assist you with:
• Organization of excursions, including surf lessons, ATV tours, private sailing charters, fishing expeditions, and more
• Bookings for in-home massages and spa treatments
• Private chef services
• Airport transfers
This villa includes one designated parking space and one additional visitor parking spot.
Please note that while the property is located within Diria Boulevard, it is not affiliated with the Diria Hotel. However, you can enjoy exclusive amenities and access that are reserved solely for the residents of your building. Take advantage of the resort-style swimming pool, complete with a swim-up bar, offering a truly relaxing experience!
Guest Access:
Whether you prefer a personal greeting or a self-check-in, we've got you covered. Our goal is to make your stay as comfortable and stress-free as possible, so choose whichever option suits you best. Even if you choose self-check-in, we are still a call or text away to help you with anything you may need. Your satisfaction is our top priority.
The Neighborhood:
Tamarindo is one of Costa Rica's most popular destinations, offering vibrant surfing, shopping, dining, nightlife, and excellent people-watching opportunities. Just a short distance away, Baulas Marine National Park serves as a nesting ground for the majestic leatherback turtles. You can also explore the Tamarindo Estuary on a boat tour to observe monkeys, crocodiles, and exotic birds. The area provides a wide array of adventure tours by land and sea, including fishing, scuba diving, snorkeling, sunset cruises, zip-lining, ATV rentals, mountain biking, and visits to animal rescue centers.
Getting Around:
• 15 minutes to Tamarindo Commuter Airport (TNO)
• 1.5 hours to Liberia International Airport (LIR)
Other Things to Note:
As part of our standard booking process, guests are asked to choose between a $50 non-refundable damage waiver or a refundable $1,000 security deposit hold, released 5 days after check-out, provided there is no damage.
Majoituspaikan palvelut/mukavuudet
Ranta
Ranta lähistöllä
Uima-altaat/kylpylä
Ulkouima-allas
Yleinen uima-allas
Internet
Saatavilla huoneistossa: ilmainen Wi-Fi
Pysäköinti ja liikenneyhteydet
Paikan päällä pysäköinti
Keittiö
Astianpesukone
Jääkaappi
Kahvin-/vedenkeitin
Keittovälineet, astiat ja ruokailuvälineet
Leivänpaahdin
Liesi
Mikroaaltouuni
Tehosekoitin
Uuni
Ruokailu
Ruokapöytä
Makuuhuoneet
3 makuuhuonetta
Lakanat saatavilla
Kylpyhuone
3,5 kylpyhuonetta
Hiustenkuivaaja
Pyyhkeet saatavilla
Sampoo
Suihku
Oleskelutilat
Ruokapöytä
Viihdetarjonta
Televisio ja kaapeli-/satelliittikanavat
Ulkotilat
Grilli
Parveke
Pesulapalvelu
Pyykinpesukone
Pyykinpesutilat
Työtilat
Työhuone
Ilmastointi ja lämmitys
Ilmastointi
Lemmikit
Lemmikkejä ei sallita
Sopivuus/esteettömyys
Hissi
Savuton majoituspaikka
Palvelut ja mukavuudet
Lakanoiden vaihto (pyynnöstä)
Silitysrauta/-lauta
Sijainti
Lähellä meren rantaa
Tekemistä
Vesipuisto
Kalastusmahdollisuus lähistöllä
Kasino lähistöllä
Turvallisuusominaisuudet
Häkävaroitin (majoittaja on ilmoittanut, että majoituspaikassa on häkävaroitin)
Savuvaroitin (majoittaja on ilmoittanut, että majoituspaikassa on savuvaroitin)
Saat majoittajalta ohjeet sisään- ja uloskirjautumiseen sähköpostitse.
Majoituspaikan antamien tietojen käännöksissä on saatettu käyttää automatisoituja käännöstyökaluja
Talon säännöt
We want to ensure that all our guests have a comfortable and enjoyable stay at our property. To help ensure this, we kindly ask that all guests and...
Lemmikit
Lemmikkejä ei sallita
Lapset ja varavuoteet
Lapset ovat tervetulleita
Tapahtumat
Tapahtumien järjestäminen ei ole sallittua
Tupakointikäytännöt
Tupakointi ei ole sallittu
Tärkeää tietoa
Hyvä tietää
Tätä majoituspaikkaa hallinnoi majoitusyritys. Se tarjoaa majoitusta kaupankäynti-, ammatinharjoittamis- tai liiketoimintatarkoituksissa.
Lisähenkilöistä saatetaan veloittaa maksu, joka vaihtelee majoituspaikoittain
Sisäänkirjautumisen yhteydessä saatetaan vaatia virallinen kuvallinen henkilöllisyystodistus sekä pankki- tai luottokortti tai käteisellä maksettava takuumaksu mahdollisten lisämaksujen varalta.
Erityispyyntöjen toteutuminen riippuu saatavuudesta sisäänkirjautumishetkellä, ja niistä saatetaan veloittaa lisämaksuja. Erityispyyntöjen toteutumista ei voida taata.
Juhlien tai ryhmätapahtumien järjestäminen on kielletty majoituspaikassa
Pitkäaikaisvuokraajat tervetulleita
Majoittaja on ilmoittanut, että majoituspaikassa on häkävaroitin
Majoittaja on ilmoittanut, että majoituspaikassa on palovaroitin
Tämän majoituspaikan turvaominaisuuksiin kuuluu ensiapupakkaus
Tässä majoituspaikassa on ulkotiloja, kuten parvekkeita, patioita ja terasseja, jotka eivät saata soveltua lapsille. Jos sinulla on kysyttävää asiasta, suosittelemme sinua ottamaan yhteyttä majoituspaikkaan ennen saapumistasi, jotta he voivat antaa sinulle tarpeisiisi sopivan huoneen
Tätä majoituspaikkaa hallinnoi kumppanimme Vrbo. Saat Vrbolta sähköpostitse linkin Vrbo-tilille, jonka kautta voit muuttaa varaustasi tai peruuttaa sen.
Jos peruutat varauksesi, sinua koskee majoittajan peruutuskäytäntö. EU:n kuluttajan oikeuksia koskevien säädösten mukaisesti peruutusoikeus ei koske majoitusvarauspalveluita.
Tietoja alueesta
Huoneisto sijaitsee lähellä vesipuistoa ja lähellä rantaa. Alueen luonnonkauneuteen voi tutustua kohteissa Tamarindon ranta ja Conchalin ranta. Parque Nacional Marino Las Baulas ja Monkey Park ovat myös vierailun arvoisia. Tutustu lähiseutuun ja kokeile erilaisia aktiviteetteja; täällä voit muun muassa kalastaa. Vieraile matkaoppaassamme kohteeseen Tamarindo
Onko majoituspaikassa Ocean View | Pool Bar & Walk to Everything uima-allas?
Kyllä, tässä majoituspaikassa on ulkouima-allas.
Onko Ocean View | Pool Bar & Walk to Everything lemmikkiystävällinen?
Ei, tämä majoituspaikka ei salli lemmikkejä.
Kuinka paljon pysäköinti maksaa majoituspaikassa Ocean View | Pool Bar & Walk to Everything?
Paikan päällä oleva pysäköinti on saatavilla majoituspaikassa.
Mihin aikaan majoituspaikan Ocean View | Pool Bar & Walk to Everything sisäänkirjautuminen on?
Sisäänkirjautuminen alkaa klo 15.00.
Mihin aikaan majoituspaikan Ocean View | Pool Bar & Walk to Everything uloskirjautuminen on?
Uloskirjautuminen tapahtuu klo 10.00.
Missä Ocean View | Pool Bar & Walk to Everything sijaitsee?
WAYRA Institute of Spanish ja Tamarindon ranta sijaitsevat 2 kilometrin päässä tästä merenrannalla sijaitsevasta huoneistorakennuksesta. Langostan ranta ja Tamarindo Church ovat myös 5 kilometrin päässä.
Ocean View | Pool Bar & Walk to Everything – arvostelut
Arvostelut
Upea
Kaikki näytetyt arvostelut ovat peräisin oikeilta asiakkailta. Vain meidän kauttamme majoituksen varanneet matkailijat voivat lähettää arvostelun. Tarkistamme arvostelut ohjeidemme mukaisesti ja julkaisemme kaikki arvostelut, niin positiiviset kuin negatiiviset.
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Matapalo 501
Had a great time! Beautiful facility! View of the beach, pool, and monkeys!
Dale F.
Yöpyi 3 yötä maaliskuussa 2025
Tarkistettu arvostelu
10/10 Loistava
Julia E.
9.6.2023
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Great location & amazing property amenities
The condo is ideally located next to the beach and a ton of amazing restaurants. The pool on site is fantastic and the condo is very well appointed. I would return to this property again!
Julia E.
Yöpyi 4 yötä toukokuussa 2023
Tarkistettu arvostelu
10/10 Loistava
Ethan H.
25.2.2023
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Great Location
Beautiful condo with an amazing view. Access to the pool and Diaria amenities was great. Resort feeling with everything in town only a short walk away.
Ethan H.
Yöpyi 4 yötä helmikuussa 2023
Tarkistettu arvostelu
10/10 Loistava
Karen W.
14.6.2023
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Great place
The condo was secured, spacious, clean and very well-equipped with a central location and nice amenities.
Karen W.
Yöpyi 4 yötä toukokuussa 2023
Tarkistettu arvostelu
10/10 Loistava
Juan
16.10.2022
Hyvää: Siisteys, palvelut/mukavuudet, majoituspaikan kunto ja tilat ja viestintä
As described. Centrally located. Amazing views. Very convenient.
Juan
Yöpyi 3 yötä lokakuussa 2022
Tarkistettu arvostelu
10/10 Loistava
Gregory S.
14.4.2023
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Amazing property in Tamarindo
We had the joy of staying at this beautiful property in Tamarindo. I'll lay out the pros and cons below, but the pros FAR outweigh the cons and do not detract from our overall property's 5 star review. This is a must stay location and we would definitely book again, given the opportunity.
Pros:
Easy check-in/check-out
Great Location
Amazing View
Amazing pool
Easy Parking
Very clean
Quick communication and issue resolution from property manager.
Cons
Showers did not get hot
Beds are VERY firm
Living room furniture could use some updating
Again, these cons did not detract from our overall 5 star perception. If you are looking in Tamarindo, this is the place to stay.
Gregory S.
Yöpyi 4 yötä huhtikuussa 2023
Arvostelu yhteistyökumppanin sivustolta
10/10 Loistava
Tisha C.
29.9.2022
Fantastic location and views!
Rating Details:
The property manager was very helpful.
The vacation rental was spotless.
I was very happy with the location.
I was very satisfied with the condition of the vacation rental.
Overall, I recommend this vacation rental.
Reviewer Comments:
The views are the best! The location is amazing. There are 5 balconies! Walk to everything in Tamarindo. Sunset views are amazing. Love the Diria hotel lagoon pool and swim up bar. Nicely furnished. Super comfortable and spacious. We will return.
Tisha C.
Tarkistettu arvostelu
10/10 Loistava
Stacy P.
18.5.2023
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
The perfect choice!
We had an amazing experience at Matapalo 501! The condo was fantastic and Krain was exceptional to work with. We loved the pool and ocean views from all of the balconies. The complex was quiet and perfect for our two small children. They loved playing in the pool and my husband and I loved the swim up bar. Communication with Krain was excellent and they made transportation to and from the airport a breeze and they were extremely accommodating when we experienced a delay in our flight. We would absolutely recommend them as they made our experience so great.
Stacy P.
Yöpyi 7 yötä toukokuussa 2023
Tarkistettu arvostelu
10/10 Loistava
Penny F.
12.2.2023
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Needs a little updating
Beautiful unit and views! Love the pool.
The balcony chairs need replacing.
The drapery hardware is all broken.
The place needs a blender. The bed pillows are very uncomfortable.
Penny F.
Yöpyi 7 yötä helmikuussa 2023
Tarkistettu arvostelu
8/10 Hyvä
James M.
14.8.2023
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Tamarindo
Overall great property. Our second stay at this unit. Great location, great property. Curtains need attention. Last year also noted. Not on track and had to use chip clips to close completely. Ceiling fan on main porch still not working. Last year had bird nest which has been removed, still unable to turn on. Bedroom with twins did not cool properly. Did not request repairs for these issues as not that big of a problem. Dishwasher leaked, mgmt. did send someone, but was not able to repair. Would still consider again for next trip as total property package is great. would also look at other properties at this location.
James M.
Yöpyi 7 yötä elokuussa 2023
Arvostelu yhteistyökumppanin sivustolta
10/10 Loistava
Lisa W.
3.7.2024
Tamarindo Oasis
Rating Details:
The property manager was very helpful.
The vacation rental was spotless.
I was very happy with the location.
I was very satisfied with the condition of the vacation rental.
Overall, I recommend this vacation rental.
Reviewer Comments:
Amazing! Our family of five had a perfect stay. The condo, the property, location, grounds staff exceeded our expectations. We would love to return! It was clean, ready on time, everything was in perfect working order. Elevator worked perfectly. I was concerned because some of the reviews. However, everything was completely well maintained, well stocked, well appointed. Very spacious! The management responded to all inquiries before and during our stay. The pool/pool bar was similar to a resort. Location was right in the middle of town. A few heads up- bring coffee/coffee filters, expect several hours for air conditioning to cool the unit, toilets require multiple flushes, shower water pressure is low/doesn’t get very hot (all of this was fine, no complaints whatsoever... its nice to have realistic expectations). Grounds crew, cleaning staff and security were all very nice and friendly (i wanted to counter previous assertions to the contrary based on our family’s experience). There were monkeys in the trees of the property which was a delight! Walk across the street and you are on the beach! 🏖️ Also Hotel Diia across he steet has a wonderful brunch buffet we loved!
Lisa W.
Yöpyi 8 yötä kesäkuussa 2024
Arvostelu yhteistyökumppanin sivustolta
10/10 Loistava
ROBERT B.
4.5.2024
MAY FISHING TRIP
Rating Details:
The property manager was very helpful.
The vacation rental was spotless.
I was very happy with the location.
I was very satisfied with the condition of the vacation rental.
Overall, I recommend this vacation rental.
Reviewer Comments:
OUTSTAND CONDO IN THE HEART OF TAMARINDO. 3 MINUTE WALK TO THE BEACH AND AN OUTSTANDING POOL AREA WITHIN THE COMPLEX. DEFINATELY WILL RETURN.
ROBERT B.
Yöpyi 4 yötä huhtikuussa 2024
Arvostelu yhteistyökumppanin sivustolta
2/10 Hirveä
Barrett M.
17.4.2024
Krain Costa Rica left us stranded
Rating Details:
The property manager was very unhelpful.
The vacation rental was very clean.
I was more than happy with the location.
I was more than satisfied with the condition of the vacation rental.
Overall, I do not recommend this vacation rental.
Reviewer Comments:
The instructions to check in were wrong. The phone number listed did not work. This was verified by the entire security team at the hotel & condo. Emails were not returned. After an hour and half we had no choice but to check into the hotels last room at an inflated price to cram into. Without a fridge we disposed of our groceries.We did however get a call the next day from a rep named Tony. He asured me they would take care of us but didnt confirm until 11:55am when we had already packed to leave and booked another hotel for the evening. He assured us a manger would call or email. THEY DID NOT> no stones. He assured they would refund us but as of today they have not. VERY DIAPPOINTED. The property was nice but the damages outweighed the stay. They also jammed us into a PDF one way rental agreement after they charged my card. Hasve lawyer read it and add a vacation damages clause or you may be out of pocckt like me. NOT HAPPY. We will be contacting the owner of the property next week to let him know how disappointed we were.
Barrett M.
Arvostelu yhteistyökumppanin sivustolta
6/10 Kohtalainen
Michael V.
25.3.2024
Disappointing....for the money
Rating Details:
The property manager was adequately helpful.
The vacation rental was very clean.
I was very happy with the location.
I was somewhat dissatisfied with the condition of the vacation rental.
Overall, I do not recommend this vacation rental.
Reviewer Comments:
We had the a 5th floor room with beautiful views. The Diria property is the best but this unit was sub-par for the cost. We have stayed in about 6 or 7 of the Diria Matapalo condos and this by far was the worst (except the views). Issues: toilets barely flush due to little pressure, 2 bathroom's shower heads were dangling hoses due to the clips being broken, air conditioner didn't cool the 3rd bedroom, bathroom soap dispensers were broken and dangling, bathroom towels were pretty much rags, family room couch was original 2012 and was saggy to the frame, the patio furniture is original 2012 and you are sitting on metal bars. We had to request more towels, drinkware and kitchen items to suit the unit being for 6 people as advertised. The property management's job is to advise the owner when the unit requires upgrades, replacements, amenities, etc. With this unit's rent going up by $1000's for 2025, we moved to another unit.
Michael V.
Yöpyi 56 yötä tammikuussa 2024
Arvostelu yhteistyökumppanin sivustolta
8/10 Hyvä
15.11.2023
Pura Vida
Rating Details:
The property manager was very helpful.
The vacation rental was spotless.
I was very happy with the location.
I was satisfied with the condition of the vacation rental.
Overall, I recommend this vacation rental.
Reviewer Comments:
It was great! Wonderful location and great views! There are a few items that needed to be attended to, shower head in queen bedroom was not working properly. Two outside fans were also needing attention.
Arvostelu yhteistyökumppanin sivustolta
10/10 Loistava
A guest from Calgary, Alberta
22.4.2023
Excellent Location
Rating Details:
The property manager was very helpful.
The vacation rental was spotless.
I was very happy with the location.
I was more than satisfied with the condition of the vacation rental.
Overall, I recommend this vacation rental.
Reviewer Comments:
This condo was amazing for my family of four, it was comfortable and spacious. The view from the decks was phenomenal, and the location was amazing easy walking to everything in Tamarindo, the facilities in the hotel, along with the pool and swim up bar were the perfect way to end a busy day.
A guest from Calgary, Alberta
Arvostelu yhteistyökumppanin sivustolta
10/10 Loistava
Bogdan S.
29.7.2022
Great Condo
Rating Details:
The property manager was very helpful.
The vacation rental was spotless.
I was very happy with the location.
I was very satisfied with the condition of the vacation rental.
Overall, I recommend this vacation rental.
Reviewer Comments:
Really nice and clean condo in great location. Amazing views from all of the rooms.
Bogdan S.
Arvostelu yhteistyökumppanin sivustolta
10/10 Loistava
Valerie R.
11.6.2022
Great Diria Condo Mat #501
Rating Details:
The property manager was very helpful.
The vacation rental was spotless.
I was very happy with the location.
I was very satisfied with the condition of the vacation rental.
Overall, I recommend this vacation rental.
Reviewer Comments:
I had a great experience with Krain. It was easy to book my condo through their website and responses from Krain were quick. I booked at Diria Condos Matapalo #501 in Tamarindo, Costa Rica. The condo was beautiful, big, plenty of bathroom space, comfortable beds, clean and the view was spectacular. There is 180 degree views since the apartment is on the end. The only problem is we couldn’t get the dishwasher to work. The location is perfect. In the middle of town close to everything! The person who helped me with my stay was Tony. He went over and beyond to make our stay pleasant. Tony helped us book a boat trip with Panache. It was a wonderful day & I recommend booking that boat on your stay. He arranged an airport pick up for us. Plus he gave us several recommendations for zipline tours. We communicated through What’s app and he responded fast even late at night. It was nice to have a local set up our excursions for a group of 15 so I wouldn’t have to waste vacation time doing it myself! On the last day of my vaca, 2 of us tested positive for Covid. We had to isolate for 5 days. He was very understanding and let us have a late check out so we could make arrangements for a place to stay to isolate. Overall, from start to finish Tony was courteous, knowledgeable and helpful. Book with Krain for Diria Condo Mat#501 and ask for Tony if you need help with anything. Thanks again. 10 star Rating!!!!
Valerie R.
Arvostelu yhteistyökumppanin sivustolta
6/10 Kohtalainen
A guest from N/A, CO
5.6.2022
Tamarindo May stay
Rating Details:
The property manager was adequately helpful.
The vacation rental was very clean.
I was very happy with the location.
I was somewhat dissatisfied with the condition of the vacation rental.
Overall, I do not recommend this vacation rental.
Reviewer Comments:
Birds nest in the ceiling fan tells the story of lack of attention by the management company for readying the condo. No internet. A stove that was improperly installed and a real estate tour that never happened. Buyer beware.
A guest from N/A, CO
Tarkistettu arvostelu
10/10 Loistava
Heather S.
23.4.2022
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Absolutely amazing!!!
All I can say is…wow! This condo is amazing! Clean, gorgeous, perfect. It has 6 balconies with the most wonderful views, especially the one with the 2 lounge chairs off the master bedroom. Checkin was super easy with the keyless entry. The condo is on the 5th floor which made the views perfect.
The pool at the condo is huge, clean, warm…perfection. Plenty of lounge chairs and a few daybeds. We were there mid/end of April, it was not crowded. There is a swim up pool bar. The condo came with 6 beach towels which was really nice. The beach is 1/2 block and across the street. Everything in Tamarindo Beach is totally walkable. No need to even have a car. Transfers from Liberia are about $100 each way for 5 people.
There is a market next door called El Mercandito: it is an outdoor food court with tons of options, a bar and music. So convenient! All of the restaurants were great in town. We especially loved the food at Pico and the fire show on the beach at El Be (it was around 6:45pm when we were there).
Already thinking of booking this again for next year. You won’t be disappointed!
Heather S.
Yöpyi 3 yötä huhtikuussa 2022
Tarkistettu arvostelu
10/10 Loistava
Alan S.
18.4.2022
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Excellent!
We spent 5 days in this lovely condo and enjoyed every minute of it. The condo is well done, view's are awesome and the amenities are excellent. Highly recommend!
Alan S.
Yöpyi 5 yötä huhtikuussa 2022
Tarkistettu arvostelu
10/10 Loistava
Hayley C.
8.5.2025
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys
Hayley C.
Yöpyi 7 yötä maaliskuussa 2025
Tarkistettu arvostelu
10/10 Loistava
Roger J.
3.4.2025
Hyvää: Siisteys, sisäänkirjautuminen, viestintä, sijainti ja listauksen paikkansapitävyys