Product details100% Water Proof.?This Mattress Protector has 100% water resistant TPU backing , Protecting your mattress from fluid spill like sweat and urine. it is filled with alternative high soft Polyester fiber, enable a better capacity of trapping/locking liquids & prevent formation pf puddles. No More frustration of trying to clean the mattress with Urine or spill Leakage through it.