SUNGUARD is a strip of webbing stitched "over" the hem, the outside edge of the trampoline mat. This provides protection against premature Dry-Rot/Ageing from the Suns UV rays. This SUNGUARD will increase the life of your trampoline mats stitching for several years. This can be added to most any trampoline replacement mat. Colors May Vary! Most colors are black with a red or blue stripe. Please allow extra time to sew the strip of material on the mat. 7-10 days.