The Sleep Fresh Pillows have plump, supportive clusterfibres that are encased in a breathable cotton cover. Hypoallergenic and washable at home for a fresher, healthier night's sleep. Specifications Cover: 100% Sustainably Sourced Cotton Filling: 100% Clusterfibre Microfibre Wash at 40°C. Tumble dry until thoroughly dry. Do Not Bleach. Do not dry clean.