Nook's customer-favorite DreamSheet just got a little dreamier. Meet Waterproof Crib DreamSheet. It's like a crib sheet and mattress protector in one! Designed with our patented raised Pebbles to increase your baby’s airflow and a waterproof backing to protect your mattress from leaks and messes. DreamSheet Waterproof ensures a supremely soft, no-spill snooze on any standard crib mattress. Your baby will sleep soundly on Nook DreamSheets because, well, they’re a dream!