ECR4Kids Rest Mat Sheet, 48" x 24", White (10-Pack) Sanitary Solution - rest mat sheets help keep mats clean and up to sanitation standards in daycares, preschools and home environments. Machine-Washable  throw sheets in the washing machine between uses for like-new freshness Easy to Attach  sheets designed with pouch-style closure for quick application and removal Full Coverage  designed for maximum coverage on sleeping side of mat to ensure little ones are protected High-Quality Material  sheets made with 65/35 cotton/polyester blend and 200+ thread count