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Navy Blue Play Mattress Set for Kids
$364.00 USD
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Imagination Meets Good Taste
It’s a peculiar fact of life that sofas rarely double as dragon lairs. Enter this rather marvellous navy blue play mattress set: soft, foldable, and altogether more inspiring than your average seating arrangement. Whether it’s a lunar base or simply a snug book nook, this set turns everyday play into the story of the year.
Why Choose Our Navy Blue Play Mattress Set?
Safe by Design: Rounded edges and cushioned materials offer a cosy—and might we say forgiving—play space for wobbly walkers and junior gymnasts.
Effortlessly Versatile: One moment it's a sofa, next it’s a fortress under siege. A yoga mat? Certainly. A bed for an emergency nap? Naturally.
A Rather Good Gift: Ideal for birthdays, holidays, or those peculiar Tuesdays when you're feeling generous. Loved by toddlers, teens and the ever-so-young-at-heart.
Product Details:
Base Mattress: Firm yet comfy foam with a removable, washable cover. Measures 170 x 85 x 15 cm.
Flexible Mattress: A thinner, more pliable companion for layering or lounging. Size: 170 x 85 x 8 cm.
Two Trapezoidal Pillows: For building, perching, propping and the occasional pillow duel. Size: 56 x 56 x 31 cm.
Rather Good Reasons to Love It
Encourages Active Play: They move, jump, contort—who needs a gym when you’ve got imagination and foam?
Feeds Creativity: Open-ended play with no screens, beeps or charger drama. Just pure, marvellous mayhem.
Builds Independence: Durable, foldable and utterly suitable for solo missions in outer space—or the hallway.
Materials and Care
Certified Safe: Covered and filled with OEKO-TEX STANDARD 100 certified materials. No gremlins, just goodness.
Effortlessly Washable: Zip-off covers that take kindly to the washing machine. For the moments when curiosity gets messy.
Foldable Design: Packs away easier than most flatpacks. Although frankly, it’s unlikely to stay folded for long.
Shipping Information
Delivery fees depend ever so slightly on postcode:
- Estonia, Latvia, Germany, Sweden, Denmark, Poland, Slovakia, Hungary – 24.99€
- Lithuania, Spain, The Netherlands, Belgium, Ireland, UK, Luxembourg, Slovenia, Czech Republic, Austria, Italy, France – 29.99€
- Finland, Bulgaria, Croatia, Greece, Portugal, Romania – 49.99€
This delightfully stylish set transforms any room into a marvellous place to play, perch or pretend. Order now to spark their next grand adventure.
SHIPPING + RETURNS
THE RATHER IMPORTANT BITS
This rather lovely piece ships directly from our brand partner - we work with independent brands who are absolutely brilliant and work frightfully hard to create beautiful things.
SHIPPING DESTINATIONS
Now, here's the thing - our wonderful brand partners ship to lots of different places, but not all of them can ship worldwide.
Some are brilliant at international shipping, others prefer to keep things closer to home.
At checkout, you'll see exactly where this particular brand can send your goodies.
We're terribly sorry, but shipping costs do vary rather wildly depending on where you are in the world. The exact figures pop up at checkout - no nasty surprises!
RETURNS
You have 14 days to return items.
Now, we absolutely adore our brand partners - they work incredibly hard and we do try to support them as much as we possibly can. So I'm rather afraid we have to pass the return postage costs back to you. Frightfully sorry about that!
🌍 PLEASE CHOOSE THOUGHTFULLY:
Our wonderful partners put their hearts into everything they make.
Ordering multiple sizes to try at home is rather hard on our planet and makes things jolly difficult for these brilliant independent creators.
When in doubt, do ask us first!
The brands we work with all have a chat option, and they love to chat!
PAYMENT
We're frightfully modern and accept all the usual suspects:
Visa, Mastercard, American Express, PayPal, Apple Pay, Google Pay, and Shop Pay
SECURE AS HOUSES
Everything's properly encrypted and secure - your details are safer than the Crown Jewels!
All prices in lovely British pounds £ GBP, though international chaps will see converted prices.
Any payment pickle? We're here to help sort things out! Contact us
We are Sostter
We met as children. Grew up a few streets apart. Built dens, rode bikes, and eventually — built Sostter.
It started with a shared love of objects that meant something…things with a past, or at least a purpose.
Now, Sostter is our grown-up version of a treasure hunt: a space where design meets storytelling.
We curate independent brands, one-of-a-kind finds, and everyday essentials with character.
Giving Back
We’re proud to support Sutton Night Watch, a grassroots UK charity making a real difference in the lives of those facing homelessness. Through regular donations of stock, supplies, and essentials, we back their mission to offer warmth, dignity, and practical help to anyone in need — right where it matters most.
Sell with us
Sostter partners with independent brands that intrigue, inspire, and bring something genuinely different to the world of fashion, design, and living. Join us!