Pacific Play Tents Tunnels of Fun Junction Set Four 3 ft. x 19 inch tunnels and 35.5 inch center junction - Tunnels collapses flat for easy storage and portability 190T 70 Denier Polyester Taffeta fabric with durable construction for long lasting play and fun Interior padding around hardened heavy duty spring steel wire structure for safety and playtime comfort Easily wipes clean with a damp cloth and mild soap - indoor or outdoor use Crawling and tunnel play are excellent for muscle and motor skill development in toddlers and children