Defend your baby's mattress against diaper leaks, spills, and stains with the Simmons Oops! Tencel crib mattress protector. It boasts a waterproof design to keep fluids away from the mattress so it stays fresh, clean, and looking like new. It's made from breathable Tencel to help your baby stay comfortable all night long. SIMMONS Simmons Oops! Tencel Crib Mattress Protector