Waterproof Protection - The bottom is made of TPU Waterproof Membrane that protects your crib mattress against liquid such as drool, pee, spills, perspiration, leakage, and bedwetting | Very Plush & Absorbent - The middle layer is quilted thickly, with Highly Absorbent micro polyester to keep your baby warmer in winter and cooler in summer by drawing moisture away from the skin faster. | Ultra Soft - The surface of the mattress pad uses 100% cotton jersey, which is gentle for baby’s delicate skin | Snug Fit - Measures 52" x 28" for surface, side stretchable knitted design, the toddler mattress cover fits crib mattress deepth up to 8", fitted stretch skirt to help prevent sliding and shifting | Easy to Care - Machine washable with cold water, mild detergent (free from any bleach) and tumble dry low