The Tumbler Folding Mats offer a 2-1/2" thick design for enhanced cushioning to give gymnasts and athletes increased protection while providing excellent rebound. Mat construction features a 1-3/8" thick top layer of Crosslink Polyethylene foam with an underlying 1-1/8" layer of firm Polyethylene foam, all contained within a durable 18-oz. vinyl cover. Choose from various colors and select from V2, V3, and V4 options to enable side-to-side or end-to-end mat connectivity.