This Waterproof Bed Protector is made of polyester flannel layers that lock in liquids, keeping you dry and comfortable all night long. The bed mattress protector provides total mattress protection from leaks and heater malfunction. Low-profile and wrinkle-resistant, this Waterproof Mattress Pad keeps you protected all night from possible leaks and allows you to sleep with peace of mind. Give yourself a comfortable night sleep with the soft flannel of this bed mattress protector. Polyester flannel layers that lock in liquids. 100% Waterproof liner provides total mattress protection Keeps you dry and comfortable Low profile and wrinkle-resistant Cotton facing fabric is soft to the touch, has a waterproof backing & prevents spills & stains from ruining your mattress. Fabric treatment releases stains from the fabric of the protector. Stretches to fit 12in. mattress depth. Fitted Sheet Style Fits Mattress Height: 18