Given the everyday little accidents that can occur, waterproof fitted sheets are recommended to avoid staining the mattress! This fitted sheet is available in 5 sizes Flannel band with elasticated corners for a secure fit 1 comfortable sleeper side in 100% organic cotton fleece (140 g/m2) 1 waterproof phthalate-free polyurethane reverse side (80 g/m2) WHAT YOU NEED TO KNOW : Easy care, can be tumble dried *Made of organic cotton a natural material cultivated without the use of pesticides or chemical products. Vertbaudet ensures that the organic origin of the cotton threads used is guaranteed by a certified organisation.