Baby Works; Waterproof Mattress & Sheet Protector will protect your childs mattress and keep bed sheets dry throughout toilet training. No more middle of the night sheet stripping; It is 100% waterproof with a non-slip backing that fits under or over bed sheets to protect mattresses from moisture and staining. The soft quilted poly-cotton surface comes with tuck-in flaps for a snug and comfy fit on any size mattress. It is highly absorbent, bleachable, machine washable and dryer-safe too; Cotton and polyester. Protects mattress and keeps bed sheets dry throughout toilet training. 100% waterproof with non-slip backing. Soft quilted poly-cotton surface with tuck-in flaps is absorbent. Use on any size bed; Crib, twin or for those middle of the night visits to mom or dad; . Bleachable, machine washable & dryer-safe. Size: measures 33 x 29.5 / 85cm x 75cm. Machine washable covers. Suitable for cot beds and toddler beds. Size L85, W75. Suitable from birth.