POP UP DESIGN - Based on steel-spring constructionChildren play tent folds flat for convenient storage when not in use. based on steel-spring constructionChildren play tent folds flat for convenient storage when not in use. MULTIPLE CONNECTING OPTIONS - Anti-scratching attachment ropes and loops on both ends of the tunnel allows for seamless connections with compatible play tents as well as endless connections with multiple play tunnels. Manufacturered by WER. HIGHLY PORTABLE - Lightweight materials with carrying bag allows for easy transportation.The length of the Play Tunnel is 6 feet which is comparatively longer than crawling tunnels of other brand names. 100% MONEY BACK GUARANTEE - 30 DAY GUARANTEE + 1 YEAR WARRANTY ON MATERIALS Risk Free Returns within 30 Days. HIGH QUALITY MATERIALS - Made of 190T polyester cloth and flexible steel wire to guarantee odor-free play time and optimal durability.