The Pet Life Climbertree circular obstacle collapsible travel Cat House is composed of heavy duty Nylon and mesh. The Climbertree is easy to install or setup compared to the bulkier conventional cat houses. Perfect for Travel, Indoor or Outdoor usages, simply folds and collapses and features durable collapsible fiberglass poles that easily attach to the 4 corners to hold up it's structure. Features an array of multiple zippered and circular entrances for interactive play on both the bottom and secondary levels. Great for lounging or interior play.