indoor or outdoor use, our play tube features a cute caterpillar. This tunnel is excellent for muscle and motor skill development in toddlers and children. This tunnel collapses flat for easy storage and portability. Kids Plastic Caterpillar Tunnel has interior padding around hardened spring steel wire structure for safety and playtime comfort. This tunnel is made of premium-grade polyester that’s skin safe yet extremely durable; your growing toddlers and children can play, learn, grow, and build strong core muscles; all while having a great time playing together.