Fitted Crib Sheet / Mattress Pad by Sproutwise Kids – Hypoallergenic Natural Bamboo with Waterproof Liner Price: $29.99 (as of 18/10/2017 13:01 PST- Details)

2-PRODUCTS-IN-1: This sheet combines a comfortable sheet and a waterproof mattress protector to make changing bedding quick and easy — one less thing to manage. Extra deep pockets allow you to use this with almost any crib mattress. Machine washable (gentle cycle suggested).
EXTREMELY COMFORTABLE: Your Sproutwise sheet has a luxuriously soft cover because we know that comfy babies sleep better! Not having to use a separate mattress protector means less wrinkles or ridges for baby to try to sleep on.
WATERPROOF TO PROTECT MATTRESS: Food-grade waterproof liner keeps your mattress clean in case of life’s little accidents. The liner is laminated to the top layer to keep the sheet flat. Unlike some sheets, ours protects the sides of your mattress as well.