Silentnight Believe Memory Foam Kids' Mattress

Assessed from the specification published by dreams.co.uk, captured November 2026, and from regular price comparison across our UK retail partners.

The firm rating and the Miracoil springs give your child full-body support rather than a sinking feel, which suits children who like a solid, level bed. The waterproof finish deals with everyday spills, and the hypoallergenic fillings are a sensible choice if you want to limit allergens in a child's room. The quilted surface adds a snug top layer over the firm base. At 23cm deep, it's slimmer than many adult mattresses, so it should sit neatly on a child's bed frame. It suits most children who want firm support, although those who like a soft bed may find it too solid.

Children
This is a children's mattress with a firm rating and Miracoil springs, giving full-body support and a solid, level feel rather than a sinking one.

Allergy sufferers
Hypoallergenic fillings help limit allergens in a child's room, which makes this a sensible pick for households wanting a cleaner sleep environment.

Teenagers
A firm feel from the Miracoil springs suits older kids who like a solid bed, and the UK single size fits a standard single frame.

If your child prefers sleeping on a soft mattress, this might not be the best choice, as it's rated firm. Despite the name, the filling is EcoMemory Fibre, which Silentnight describes as 100% polyester fibre, so don't expect foam contouring. It can't be flipped, and it only comes in a UK single.

How firm is the Silentnight Believe Memory Foam Kids' Mattress?

It has a firm comfort grade. That suits children who like a solid, supportive surface, but if your child prefers a softer, more cushioned bed, a softer-rated mattress will probably feel better.

What sizes does the Silentnight Believe Memory Foam Kids' Mattress come in?

It's available in a UK single, which measures 90 x 190cm. Silentnight's retailer pages don't confirm any other size for this mattress, so check that a single fits your child's bed frame.

How deep is the Silentnight Believe Memory Foam Kids' Mattress?

It's 23cm deep. That's a fairly slim profile, which should suit most children's beds and leave plenty of room above the frame sides, though it's worth measuring your bed first.

What is the Silentnight Believe Memory Foam Kids' Mattress made of?

It uses Miracoil springs, 448 of them, with dual layered adaptive fillings and EcoMemory Fibre. Silentnight's Q&A describes that fibre as 100% polyester, so it's a fibre filling rather than memory foam.

Is the Silentnight Believe Memory Foam Kids' Mattress waterproof and hypoallergenic?

Yes to both. It's described as hypoallergenic and waterproof for everyday spills. That means it copes with the usual accidents, though it's not designed for being left soaked.