Play tunnels appeal to cats' natural instinct to hide in mysterious places; enclosed spaces offer security and shelter from predators while they stalk their prey. Some cats nap inside for warmth while nervous kitties can use it to escape from possible attention. Others just love sprinting through and playing 'hide and pounce' with their siblings or toys. We've built on the instinctual appeal by adding a crinkly center 'peep hole' which allows for multi-cat play and creates intriguing noise kitties can't resist. When the kitty is done hiding, sleeping, or playing, this lightweight cat tunnel for indoor cats collapses for easy storage. Suitable for pets up to 20 lbs.