Skip to main content
EN CAEnglish
6 UNDERLIG images
Skip images
UNDERLIG Foam mattress for junior bed, white, 27 1/2x63 "
Best Seller
UNDERLIG Foam mattress for junior bed, white, 27 1/2x63 "
UNDERLIG Foam mattress for junior bed, white, 27 1/2x63 "
UNDERLIG Foam mattress for junior bed, white, 27 1/2x63 "
UNDERLIG Foam mattress for junior bed, white, 27 1/2x63 "
UNDERLIG Foam mattress for junior bed, white, 27 1/2x63 "
IKEA Family price

UNDERLIG Foam mattress for junior bed, white, 70x160 cm (27 1/2x63 ")

Price $ 69.00
Regular price: $ 99.00
Price valid Aug 01, 2025 - Sep 02, 2025 or while supply lasts
(536)

How to get it

Add comfort and fun with our children's textiles: blankets, towels, bedding, curtains, rugs, and more! Explore now!

Key features
  • Thickness: 10 cm (3 7/8 ")
  • Foam
  • Firm
  • Washable cover

Your child needs a cozy place to sleep which is just the right size in order to feel safe. UNDERLIG junior mattress fits perfectly in our junior beds and gives your child a cozy sleep in their first “big bed”.

Article Number303.504.07

Product details

The cover is easy to remove and is machine washable at 140°F (Hot).

Your child can choose the comfort they prefer since the polyurethane foam has two different surfaces. The egg-shaped pattern has a medium-firm comfort, and the smooth side has a firmer comfort.

Child-safe zipper prevents children from opening the cover.

Roll-packed - easy to take home.

Designer

Synnöve Mork

  • Wash the cover inside out with the zipper closed.

  • Material

    Ticking:
    62 % cotton, 38 %polyester
    Quilt filling:
    100 %polyester
    Protective fabric:
    100 % polypropylene
    Comfort filling:
    Polyurethane foam 1.7 lb/cu.ft.

    Care

    Cover

    Machine wash very hot, normal cycle.

    Do not bleach.

    Do not tumble dry.

    Iron medium temperature, max 300°F/150°C.

    Do not dry clean.

  • The zipper is child-safe since we took away the tab on the zipper. To open and close, insert a paper clip through the loop. Make sure you always remove the paper clip afterwards.

  • Advice and care instructions

    UNDERLIG Foam mattress for junior bed303.504.07

Measurements

  • Length: 160 cm (63 ")
  • Width: 70 cm (27 1/2 ")
  • Thickness: 10 cm (3 7/8 ")

  • UNDERLIG

    Article Number303.504.07
    • Width: 70 cm (27 ½ ")
    • Height: 10 cm (4 ")
    • Length: 160 cm (63 ")
    • Weight: 4.50 kg (9 lb 15 oz)
    • Package(s): 1

Ratings and reviews

Good SaadIt’s good 5
Perfect fitMalikFits the bed frame perfect and nice and soft.5
Eactly what I wantedGailI use this mattress for my camper, and it's perfect - thin enough to fit, and firm enough to be comfortable5
Smaller AlexaI thought they were the twin size turns out their not.1
GoodEmilieFor a kid it’s ok 3
Perfect fit for the bedDenisFits perfectly on the bed and our grandson loves it.5
Perfect toddler mattressElizabethThis mattress is great. My toddler has no complaints and it fit within our budget perfectly.5
ComfortableElishaHappy with this foam mattress for our 4 year old.4
It seems fit for myKamranIt seems fit for my son4
Good 👍MagedGood 👍4
good quality and priceReyhanehgood quality and price5
Good for tiny people.LakshaGood for tiny people.4
Was told to get thisAleishaWas told to get this for a twin bunk bed and it didn’t fit I wouldn’t even put this on a single1
It works great!CourtneyIt works great!5
Good value. Very comfortableMaiGood value. Very comfortable5
CozyDeniseComfortable5
Not comfy at allSerenadaNot comfy at all unfortunately1
No sheets available for this mattressAnonymousBought this mattress and a bed. Seems good but the store didn't have sheets for it. They said they would have them in a couple of days. They did not and still don't. I will have to order them and pay the shipping fee. The shipping fee is more than the sheets. Crazy. The other option is to take a twin sheet and fold it in half. Not ideal. I would not recommend buying this mattress or the kritter bed that it fits. Just go with a twin bed because then you can get sheets for it anywhere.1
“Junior” bed - NOT TWINAnonymousI was confused by the title and ordered this with one of the kids’ beds (twin). It’s more an individual sleeping mattress than anything for a bed. Good quality but annoying marketing as now I have to go and return it.3
Good for sore back and kneesAnonymousI bought this mattress for a myself. I am about 134lbs and 5.3 ft. It's a kids mattress, and I'm pretty petite senior. I have rheumatoid arthritis and was waking up in pain from my knees mostly. I suffer from bad back too. Anyway, I bought this as a spare bed so I could lay down in a dark room when I have a migraine. While I was using it to escape light and noises, I fell asleep, and when I woke up in the morning, I took notice right away that I didn't have any knee pain. Because of the firmness of this mattress, I realized it was keeping my knees straight while I slept. Whereas, my main queen bed mattress was too soft and it would cause my knees to hurt, and I'd wake up in horrible pain. Since then I've been sleeping on this mattress in my den for 6 months. I am being totally honest here; Out of those 6 months, I may have been awakened twice with knee pain but not severe like on my soft mattress. And, after 6 months there's no sinking issues, or abnormal areas..This mattress is working for me and it's my main sleeper now. No more back pain flare ups either. It's a nice mattress with a cover you can remove to wash. If you like a soft mattress this will not work for you. Also, you'd have to be kid-size to sleep on it. There's not much room otherwise. I can't comment on how a child would like it, but I believe it would be good as it would keep their bodies straight and supported as they grow...Thanks for taking the time to read this.4

Customer reviews

4.4Average rating
536Reviews
Skip listing
More comfortable than anticipated
5
Bought this for our 3 1/2 year old grandson to go along with the ikea jr bed, his first big boy bed since the crib (modified), and he is sleeping great. I’ve even laid on it and find it to be far more comfortable than anticipated.
Rose, United States of America
Could only buy this mattress to fit toddler bed but very happt with it
5
Was not sure when mattress was in a roll as to how it would flatten but seems comfortable enough. Definitely suits what I need it for
Jenny, Australia
Eactly what I wanted
5
I use this mattress for my camper, and it's perfect - thin enough to fit, and firm enough to be comfortable
Gail, Canada
How do you sleep?

Design it yourself

Find your best sleep comfort bliss with our comfort guide.

Material

What is foam?

Foam is excellent as upholstery in seating and mattresses since it provides good comfort and can relieve pressure by moulding to the body. Depending on the properties and feel you’re looking for, there are several qualities to choose from, like high-resilience foam and memory foam. The raw material for foam was previously based entirely on virgin fossil materials. But today, together with our suppliers, we’ve begun developing a material that is renewable and recycled.

Quality

Soft and pleasant with good support

This 4" thick mattress has two different surfaces ‒ one egg-shaped side with medium-firm comfort and one smooth side which is firmer. The texture of the foam makes the mattress soft and well-ventilated, which provides good support and a comfortable sleeping environment for your child. The cover can be removed and machine washed at 140°F.

Get the look

Ideas based on your recently viewed products

Skip listing