Why choose this topper? Bouncy hollow fibres Encourages air flow Aids temperature regulation Super stretchy corner straps fits mattresses up to 30cm deep Easily machine washable at 40°C 1 year guarantee Made in the UKInitially developed for the Olympic Team GB athletes for Tokyo 2020. This sumptuous & deep filled topper adds a layer of luxurious comfort to any mattress & could help you sleep like a champion! Filled with bouncy hollow fibres that are constructed in two separate layers to encourage air flow, aid temperature regulation & stay fresh, whilst the air mesh side walls help the air circulate freely around your body. Specifications: Dual layer soft & resilient polyester fibre