Firm Polyethlylene 1 1/2” closed cell mats combine “no-bottoming” compression for high-impact landings, firm footing and super-lightness. Intermediate and advanced challenges like cartwheels, round-offs and hand-stands require firm support...the mat cannot give too much or be too “squishy” or the user’s support and balance may be lost. Polyethylene mats offer this kind of firm surface, with just a little “give” on impact. Their semi-firmness also means they cannot “bottom-out” into the floor underneath, no matter how hard the landing or how heavy the user. These Polyethylene mats are lightweight and fold into 2’ panels for easy storage and handling. 5 year guarantee! Available in 16 oz.. vinyl in the following colors; white, gray, black, yellow, tan, orange, red, maroon, kelly green, forest green, sky blue, champion blue, royal blue, navy blue, and purple. List colors in comments section at checkout. If no color is designated, royal blue will be shipped. Allow 4-6 weeks for delivery. Not designed for dismounts for apparatus.An Explanation Of Vinyl Cover Thickness: The thickness of the vinyl cover is measured in ounces. “16 oz vinyl means that every square yard of material weighs 16 ounces. Made in the USA.