Polyester
LEAK PROOF PROTECTION: 1 pack; our pad can hold up to 8 cups of liquid, much more than others; moisture is quickly absorbed into the pad and then dispersed throughout, helping to prevent leakage; also features leak proof edges, resilient inner layers and a thick waterproof barrier to offer additional, unparalleled protection that will give you the comfort and security you need
SLIP RESISTANT BACKING: featuring our exclusive non skid and non adhesive backing, the pad is designed to stay in place overnight; no more uncomfortable adjusting, even for the most active sleepers

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