Plus, its moisture-wicking properties will help to keep your mattress clean by deterring mould, mildew and dust mites. Removeable bamboo cotton case For easy care, the bamboo cotton case is fully removable and machine washable. This mattress topper is soft and luxurious, with a range of benefits for your sleep and health. It is made of bamboo, which is breathable and thermoregulating, and also includes a memory foam layer for support and pressure relief. The bamboo cotton case is removeable and machine washable.