Richell USA's Convertible Indoor/Outdoor Pet Playpen with Pet Comfort Mat was the ideal solution to keeping an escape-prone dog safe and happy outside, our reviewer reported. The playpen's lockable gate door afforded easy access to both pet and owner, and its water-resistant material made it easy to keep clean. Add in that no tools were required to set it up and that it readily converted into a freestanding pet gate or a room divider and the result is one very satisfied tester. Available with either four or six panels, the playpen's specially designed panels allow for multiple configuration options. The optional Pet Comfort Mat fits the 6-panel hexagon configuration. An optional Convertible Floor Tray works with the 4/6-panel rectangle configuration. The playpens are designed for dogs up to 88 lb.