This 100% cotton flannel sheet is hourglass desinged with an envelope style opening in the back center specially made to fit the Halo Swivel Sleeper Bassinet. The fabric is a medium weight flannel for a durable, and comfortable, long lasting sheet. The safety and comfort of your baby is our top priority. These sheets are so durable that they will last all through your baby's growing years. At Sheetworld we produce the highest grade sheets on the market today. Features a Flannel FS4 - Blue print. Size: 17 x 30.