The KAS Kopenhagen Mattress Extension is designed to transform your Kai Babycot into a comfortable junior bed. This extension piece pairs perfectly with the standard Kai mattress, creating a longer, seamless sleeping surface that supports your growing child.
Simply place the mattress extension at the foot of the current mattress to extend the bed length. This practical addition ensures a snug fit and a consistent sleep experience as your child transitions from baby to toddler.
The interior is made from high-quality cold foam, known for its durability and supportive comfort. Integrated vertical air channels promote airflow and wick away moisture, helping your child stay cool and dry throughout the night.
The extension is wrapped in a premium quilted cotton velour cover made from 100% cotton. The breathable material helps regulate temperature and provides a soft, cozy surface for restful sleep. A durable YKK zipper allows for easy removal of the cover, which is washable at 60°C.
Reversible and built to last, this mattress extension is produced in Denmark and complies with the strict EN16890:2017 safety standard for children’s mattresses. It is delivered rolled and will regain its full shape and size within 48 hours after unpacking.
Make your Kai Cot future-ready with the KAS Kopenhagen Mattress Extension – a safe, breathable, and easy solution for growing toddlers.
Kas Kopenhagen
Discover Kas Kopenhagen at Akomo Kids — a Danish design brand where timeless Scandinavian aesthetics meet honest craftsmanship and sustainable materials. Every piece brings calm, balance, and quiet elegance into the nursery, and families across the Netherlands, Germany and Belgium choose Kas Kopenhagen for its lasting quality and understated beauty.
New — The Kai Smoked Oak Collection
The Kai Collection is Kas Kopenhagen’s most iconic series, and it now arrives in a rich new finish: Smoked Oak. This deeper, warmer tone brings extra character and depth to the nursery, while keeping the collection’s signature calm, minimalist silhouette intact.
What’s Included
The Kai Smoked Oak set includes a cot bed, a chest of drawers and a wardrobe:
The chest of drawers features two cupboards, three generous drawers, and a removable changing top that adapts as your child grows.
The wardrobe offers multiple shelves, a hanging rail, tapered legs, and hidden screws for a clean, seamless finish.
Together, the pieces create a cohesive, sophisticated nursery in a tone that works beautifully in both light and darker interiors.
Shop It as a Bundle
At Akomo Kids, you can shop the Kai Smoked Oak collection as part of an exclusive bundle at a discounted price, and most items ship directly from stock for fast delivery across Europe.
The Eli Collection — Grows With Your Child
For a room that grows with your child, the Eli Collection combines flexibility and Scandinavian warmth. Crafted from solid oak, the toddler bed extends into a full single bed (90 × 200 cm) and can be converted into a daybed or a combi-bed by adding or removing side panels — a design that adapts from nursery to big-kid room.
Complete the Room — Accessories & Details
Kas Kopenhagen also offers a range of matching accessories that add both style and function:
Changing Accessories
Changing cushions and mats designed to fit the Kai wall-mounted changing unit.
Shelving
Solid oak shelving with hidden mounting — ideal for books, toys or decor.
Textiles
100% organic cotton fitted sheets with premium YKK zips.
Sustainable Craftsmanship
Kas Kopenhagen works exclusively with FSC-certified oak, safe finishes, and a quiet aesthetic built for modern family homes — whether you’re furnishing a new-build in the Netherlands, a family home in Germany, or a minimalist apartment in Belgium.
Experience It in Our Showroom
Visit the Akomo Kids showroom in Zwaag to see the full Kas Kopenhagen collection — including the new Kai Smoked Oak finish — in person. Feel the materials, compare finishes, and get personal styling advice tailored to your interior.
Free Delivery & Assembly
After your purchase, we take care of everything: free delivery and professional assembly across the Netherlands. Our team places, adjusts and finishes every piece so it’s ready to use from day one — and we take the packaging materials with us for recycling.
Why Shop Kas Kopenhagen at Akomo Kids
Personal advice in our showroom
New: Kai Smoked Oak collection
Exclusive bundle discounts on Kas Kopenhagen sets
Fast delivery across Europe
Free delivery & professional assembly in the Netherlands (if bought without discount)
Discover the timeless elegance of Kas Kopenhagen — where Scandinavian design, sustainability and craftsmanship come together. Now at Akomo Kids: the new Kai Smoked Oak collection, with option for free delivery and free assembly.
Extend your Kai Cot into a junior bed with the KAS Kopenhagen Mattress Extension. Made from ventilated cold foam with a soft, washable cotton velour cover.
Available on backorder
The KAS Kopenhagen Mattress Extension is designed to transform your Kai Babycot into a comfortable junior bed. This extension piece pairs perfectly with the standard Kai mattress, creating a longer, seamless sleeping surface that supports your growing child.
Simply place the mattress extension at the foot of the current mattress to extend the bed length. This practical addition ensures a snug fit and a consistent sleep experience as your child transitions from baby to toddler.
The interior is made from high-quality cold foam, known for its durability and supportive comfort. Integrated vertical air channels promote airflow and wick away moisture, helping your child stay cool and dry throughout the night.
The extension is wrapped in a premium quilted cotton velour cover made from 100% cotton. The breathable material helps regulate temperature and provides a soft, cozy surface for restful sleep. A durable YKK zipper allows for easy removal of the cover, which is washable at 60°C.
Reversible and built to last, this mattress extension is produced in Denmark and complies with the strict EN16890:2017 safety standard for children’s mattresses. It is delivered rolled and will regain its full shape and size within 48 hours after unpacking.
Make your Kai Cot future-ready with the KAS Kopenhagen Mattress Extension – a safe, breathable, and easy solution for growing toddlers.
| Attributes | Value |
|---|---|
| Material |
Cotton |
The KAS Kopenhagen Mattress Extension is designed to transform your Kai Babycot into a comfortable junior bed. This extension piece pairs perfectly with the standard Kai mattress, creating a longer, seamless sleeping surface that supports your growing child.
Simply place the mattress extension at the foot of the current mattress to extend the bed length. This practical addition ensures a snug fit and a consistent sleep experience as your child transitions from baby to toddler.
The interior is made from high-quality cold foam, known for its durability and supportive comfort. Integrated vertical air channels promote airflow and wick away moisture, helping your child stay cool and dry throughout the night.
The extension is wrapped in a premium quilted cotton velour cover made from 100% cotton. The breathable material helps regulate temperature and provides a soft, cozy surface for restful sleep. A durable YKK zipper allows for easy removal of the cover, which is washable at 60°C.
Reversible and built to last, this mattress extension is produced in Denmark and complies with the strict EN16890:2017 safety standard for children’s mattresses. It is delivered rolled and will regain its full shape and size within 48 hours after unpacking.
Make your Kai Cot future-ready with the KAS Kopenhagen Mattress Extension – a safe, breathable, and easy solution for growing toddlers.
Kas Kopenhagen
Discover Kas Kopenhagen at Akomo Kids — a Danish design brand where timeless Scandinavian aesthetics meet honest craftsmanship and sustainable materials. Every piece brings calm, balance, and quiet elegance into the nursery, and families across the Netherlands, Germany and Belgium choose Kas Kopenhagen for its lasting quality and understated beauty.
New — The Kai Smoked Oak Collection
The Kai Collection is Kas Kopenhagen’s most iconic series, and it now arrives in a rich new finish: Smoked Oak. This deeper, warmer tone brings extra character and depth to the nursery, while keeping the collection’s signature calm, minimalist silhouette intact.
What’s Included
The Kai Smoked Oak set includes a cot bed, a chest of drawers and a wardrobe:
The chest of drawers features two cupboards, three generous drawers, and a removable changing top that adapts as your child grows.
The wardrobe offers multiple shelves, a hanging rail, tapered legs, and hidden screws for a clean, seamless finish.
Together, the pieces create a cohesive, sophisticated nursery in a tone that works beautifully in both light and darker interiors.
Shop It as a Bundle
At Akomo Kids, you can shop the Kai Smoked Oak collection as part of an exclusive bundle at a discounted price, and most items ship directly from stock for fast delivery across Europe.
The Eli Collection — Grows With Your Child
For a room that grows with your child, the Eli Collection combines flexibility and Scandinavian warmth. Crafted from solid oak, the toddler bed extends into a full single bed (90 × 200 cm) and can be converted into a daybed or a combi-bed by adding or removing side panels — a design that adapts from nursery to big-kid room.
Complete the Room — Accessories & Details
Kas Kopenhagen also offers a range of matching accessories that add both style and function:
Changing Accessories
Changing cushions and mats designed to fit the Kai wall-mounted changing unit.
Shelving
Solid oak shelving with hidden mounting — ideal for books, toys or decor.
Textiles
100% organic cotton fitted sheets with premium YKK zips.
Sustainable Craftsmanship
Kas Kopenhagen works exclusively with FSC-certified oak, safe finishes, and a quiet aesthetic built for modern family homes — whether you’re furnishing a new-build in the Netherlands, a family home in Germany, or a minimalist apartment in Belgium.
Experience It in Our Showroom
Visit the Akomo Kids showroom in Zwaag to see the full Kas Kopenhagen collection — including the new Kai Smoked Oak finish — in person. Feel the materials, compare finishes, and get personal styling advice tailored to your interior.
Free Delivery & Assembly
After your purchase, we take care of everything: free delivery and professional assembly across the Netherlands. Our team places, adjusts and finishes every piece so it’s ready to use from day one — and we take the packaging materials with us for recycling.
Why Shop Kas Kopenhagen at Akomo Kids
Personal advice in our showroom
New: Kai Smoked Oak collection
Exclusive bundle discounts on Kas Kopenhagen sets
Fast delivery across Europe
Free delivery & professional assembly in the Netherlands (if bought without discount)
Discover the timeless elegance of Kas Kopenhagen — where Scandinavian design, sustainability and craftsmanship come together. Now at Akomo Kids: the new Kai Smoked Oak collection, with option for free delivery and free assembly.
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