Our Tumbling Mats are made with 18 oz. vinyl and industry standard, cross-linked polyethylene foam * The non-skid material on the bottom of the mat prevents it from sliding or moving when in use * They do not contain lead and have passed testing requirements enacted by the Consumer Protection Safety Improvement Act of 2012 * Tumbl Trak Tumbling Mats are the highest quality gymnastic mats available on the market today * Each mat offers 2 ft wide folding panels in a variety of colors with Velcro on two ends