Bonded Foam Gymnastics Mat - 4' x 8' x 2" RAINBOW Best bonded foam on the market 18 oz. Vinyl Cover. THIS MAT HAS 2 SIDED VELCRO (ON BOTH ENDS) FOR THE ABILITY TO ATTACH MULTIPLE MATS LENGTHWISE ONLY Resists fungus, bacteria and mildew Double-reinforced nylon stitching with inverted seams Heavier than polyurethane and polyethylene foam