This Organic cotton knitted pack n play sheet has deep fitted pockets for a better fit. This is backed with 80 percent cotton and 20 percent polyester 27 inch x 39 inch. It is free of any pesticides, this soft and cozy pack n play sheet is ideal for baby's sensitive skin. This uses certified organic cotton. It's a must have for today's nursery. These sheets can be machine washed cold with like colors, mild detergent, gentle cycle. For best results tumble dry low.