Happi-Nappi™ Pull-Off Mat Sheet: With Attached Sheet Easy pull-off constructions so kids can pull it off after nap time. Has 10 inch "wrap" around back of mat for staying power. Top cover and bottom sheet are attached for easy convenience. White Sheet is only sewn to bottom sheet on one side. The bottom end is opened. Top sheet cover is a heavy white fabric. Bottom is the cute fabric. Washes great!! NO NEED FOR TWO SEPARATE COVERS. Fits standard child care mats (LARGE MATS). Pull-Off is also available for discount store size mat (SMALL MATS). Please Scroll down the screen for viewing the fabric samples to pick from when placing the order.