Pregnant mamas, will your water break when you are in bed, do your plan to nurse your baby in your bed, and what will you do when your partially potty trained child wants to crawl into your bed in the middle of the night. Our waterproof, breathable, fitted sheet offers the ultimate in mattress protection with the comfort of an absorbent cotton micro plush top. Accidents happen, we"ve got you covered. Made of 80% cotton and 20% polyurethane.