The Playful Pooh 4 Piece Mesh Crib Liner helps keep arms and legs safe inside crib slats. It's mesh design keeps baby cooler in warmer temperatures. It measures 10 inches high x 156 inches long. The short sides are 10 inches x 27 inches with 3 sets of ties along the top and bottom. The long sides measure 10 inches x 51 inches with 4 sets of ties along the top and bottom. The woven fabric is made of 64% polyester and 36% cotton. The mesh fabric is 100% polyester. Care instructions: machine wash cold separately in gentle cycle, use only NON-chlorine bleach when needed, tumble dry low, do NOT iron.