Ideal for bunk beds, children's beds, guest rooms and cabin beds. Children get the same night's sleep an adult would, in a depth that still fits their bed. At 12cm there is noticeably more foam underneath them than our 10cm, so it cushions better on a slatted or bunk base - while staying slim enough for kids' beds, cabin beds and low guest frames. Visco-elastic memory foam responds to body heat and moulds to your child's shape, supporting the spine and neck and dispersing weight evenly to ease pressure at the shoulders, hips and lower back. A firmer layer beneath holds them level, which matters while they are still growing, and is why a child's mattress should not simply be a soft one. Its open-cell structure lets air circulate freely rather than trapping heat, and the foam is dust mite and mildew resistant - worth knowing if they suffer with asthma or allergies. The foam is CertiPUR certified, meaning it is independently tested and free from heavy metals and dyes. Both the materials and the mattress itself are made here in Britain, in a state-of-the-art facility in the heart of Yorkshire, and the whole mattress is tested to UK fire safety regulations. The soft knit cover unzips completely and machine washes. Spills happen - it comes off and goes straight back on. Available in all standard UK sizes, from Small Single to Super King. Your mattress is delivered rolled and boxed. Please open it within 72 hours of delivery. Take it out of the box and unwrap it fully so it can unroll - do not use anything sharp to cut it open. Once unrolled, allow 48 to 72 hours in a well-heated, well-ventilated room for it to expand to full size and for the natural foam odour to clear. Any questions, our UK-based customer care team is here to help. DS Living Size: Double (4'6)