72" SQUARE PUZZLE MAT Activity/Crawly Mats, Our Activity/Crawly Mats are different sizes and shapes. Made of 1" thick virgin foam, these vinyl covered nylon mats easily wipe clean and are multi-purpose mats for all ages. Great for school age activities and shielding from non-hygienic surfaces, or a gentle soft place for just PLAY! Not suitable for tumbling or gymnastics. Square Puzzle Mat, 1" thick.