The Jay-Be Dual Support Natural e-Pocket Mattress is for the child who wakes up hot, and for them it's the Dual Support model I'd buy: the same two layers of pocket springs as its siblings, with wool and bamboo in the comfort layers. Skip it for a top bunk, where a 20cm mattress is often too deep for the guard rail. The owner reviews are thin so far, so the build is most of the evidence.
Wool and bamboo over two layers of pocket springs
A deep e-Pocket spring core does the support, with micro e-Pocket springs on top, then fibre comfort layers with wool and bamboo, a soft knitted cover and a 3D spacer border. It's foam free and 20cm deep, with a Medium rating, and Jay-Be makes it in the UK for Bensons.
Wool is the part I'd pay for. It breathes, it handles moisture well and it sleeps cooler than synthetic fibre, which helps if your child wakes up hot. Bamboo in a mattress usually means a viscose fibre made from bamboo, and I'd treat it as a soft fabric rather than a reason to buy. The listing also calls the range eco-friendly, and I'd want to see a named certificate before giving that word any weight.
Too few owners to judge, so borrow the siblings' warning
One owner calls it fine and nothing special, suited to children and lighter adults. Another says their son loves it. With that little to go on, the length complaints on the other Dual Support models are the ones to act on: measure yours when it arrives.
Wool, a top bunk and a cool sleeper are the reasons to pass
Avoid it for your top bunk, where the mattress must sit below the maximum depth marked on the bed. Avoid it if your child, or anyone else who'll sleep on it, reacts to wool. And if your child sleeps cool and you're choosing on price, the plain Dual Support e-Pocket has the same springs. If I were buying in this range for a warm sleeper, though, this is the one I'd take home.
What to buy instead
For a bunk, the 14cm Graffiti Art e-Pocket is built to fit Bensons' bunk beds. For a child who sleeps cool, the plain Dual Support e-Pocket gives you these springs without the wool. Check both the same way on the day they arrive: lay the tape measure along the frame.