Our Activity/Crawl 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. Softly safe 52" x 51" X 1" play surface. 1" thick foam covered in wipe clean vinyl.