Living World Small Tunnel is specially designed to attach to a Living World Small Tent for small pets. It provides small animals with extended space for play and exploration. It can also be used as stand-alone play area for tunneling and burrowing. The polyester fabric makes a crinkly sound for added amusement. For indoor or outdoor use (includes corner ties to secure to the ground). Small size is suitable for hamsters, gerbils, mice and rats.