This box is sturdy, weatherproof, insulated, and uses all top grade materials so it will last for years. All framing is high-grade aluminum, as is the sturdy two-way built-in dog door. Side panels, lid, and floor are high impact plastic panels that are glued and laminated with a 1" closed cell foam core providing excellent insulating qualities. All metal and panel joints connections are riveted and backed up with waterproof adhesive/sealant to provide an even higher level of structural integrity and water resistance. The box has a one inch ground clearance to ensure your dog and its bedding material is always dry and the lid is hinged the entire length providing easy access for cleaning. The feature that really sets this unit apart is it can be instantly folded for storage or travel with literally no tools required! Fold the integral sides out, drop the floor into place, close the lid and you are ready to go. The box only weighs 35lbs, so it is easy to carry and transport if needed when you're on the road. The box dimensions are 35" wide x 25" deep x 24" high. The door dimensions are 12" wide by 15" high.