<p>Folding Mats are made using 1-1/2" crosslink polyethylene foam. Meets ASTM F2440 standards. The new, thicker 16 oz. vinyl cover is flame resistant &amp; mildew proof and is constructed in a way that it is stronger than standard 18 oz. vinyl. The mats are lightweight and fold into 2' panels for easy storage and handling. For all age groups, from elementary to college. Available in 15 solid colors, or in any combination of 2 alternating colors. There is no additional charge for color combinations of 2. Allow 2-3 weeks for delivery. Not designed for dismounts from apparatus. Phthalate-free and lead-free.</p>