Filled and encased with natural cotton and an antibacterial treatment, this lightweight and breathable protector will keep your mattress fresh. This waterproof option is ideal for those who love the natural properties of cotton and want to protect their their mattresses. Machine washable for easy care. 200gsm.Fabric details:Cover: 100% cotton Fill: 95% cotton / 5% viscose, with polyurethane backing. Note: waterproof mattress protectors are not suitable for use with electric blankets.Note: For health and hygiene reasons, pillows, quilts, underlays, bed toppers, mattress and pillow protectors cannot be returned for a refund or exchange unless faulty or not as ordered.