I wouldn't put the Silentnight Kids Bonnell Quilted Mattress on a child's main bed. It's built on a bonnell open coil, a unit of springs wired together, and I don't put open coil under a growing child who sleeps on the same mattress every night. It makes sense as a spare single for sleepovers, or a pull-out bed that gets used now and then.
Bonnell springs under a layer of fibre
The support is a traditional open coil, interlaced springs joined in a lattice. Above it is a layer of Silentnight's Air Plus fibre, listed in the spec table as soft white fibres, then a knitted cover. No foam is named anywhere in the build. It comes in a single only, 90 x 190cm, graded Medium to Firm.
A linked unit spreads each press across the springs around it. That's why open coil carries movement around the bed, and why it tends to dip where the same body lies night after night. Children often sleep in the same spot, so that's where the dip forms. The mattress is one-sided, so rotate it head to foot every few months to spread the wear.
At 16cm deep, check the bed before you order
Mattress Online lists it at 16cm in the size table and 16.5cm in the description, about 6.5in either way. On a bunk or a high sleeper, a slim mattress can be the right one: it has to sit below the maximum-mattress line marked on the frame so the guard rail still does its job. Measure that line first, and never add a topper on a top bunk. On an ordinary single bed used every night, I'd want more depth and a better spring unit than this.
Avoid it as your child's everyday mattress, and avoid it for an older or heavier child, who will press harder on the coil and feel the springs sooner. If your child is a light sleeper, a unit that moves as one won't help.
The reviews describe the earlier version
The reviews on this listing were written about the Silentnight Healthy Growth Traditional Sprung, which the listing sold before. That mattress was deeper, with zoned springs and recycled-fibre fillings. Parents were mostly happy and say their children slept well, though the odd parent found it softer than expected. Read them as a guide to the range rather than to this mattress.
What to buy instead
For a child's everyday bed, buy the Silentnight Kids 600 Mirapocket. It swaps the open coil for pocket springs, is graded Medium and is 24cm deep, which is the better build for a growing back. That depth won't suit a bunk with a low mattress line, so measure before you choose between them.
