Silentnight Orthopaedic 5 cm Ultimate Mattress Topper in Single, Double, King and Super King sizes This 5 cm mattress topper by Silentnight has been specially designed to help relieve stress and pressure on aching joints. Using an ergonomic contoured shape, it moulds to the shape of your body to make you feel wonderfully comfortable and relaxed, helping you to enjoy a deep, relaxing slumber. Hypoallergenic properties mean it’s perfect for those affected by household irritants. The machine washable cover adds an extra layer of cosy comfort, so it’s easy to keep it looking, and feeling fresh. Washing Instructions: Machine Washable 5cm Depth of contoured foam Features a removable, machine washable cover 100% PU Foam Hypoallergenic 2 Years Guarantee