This mattress topper from Silentnight features contoured memory foam to ensure you get the maximum comfort available at night.Profiled memory foam provides support while allowing air to circulate and help keep you cool in addition to revitalising your existing mattress. This memory foam mattress topper responds to your shape to provide the best levels of support.With a removable washable cover, the king-size mattress topper has a 100% polyester cover.