High Grade Nylon Straps to secure rolled mat sections. Secure your rolled mats. Resilite Mat Storage Straps are made of a high quality nylon and steel D-rings. It is suggested to use one strap for every 5' of mat. For large school mats. For LIGHTWEIGHT large mats (Dollamur etc) please order #MZMSlwlgmats special straps made just for lightweight mats!