The durable plastic shell comes with heavy-duty, easy to assemble hardware. Each kennel features an easy-open squeeze latch, metal side vents to promote healthy air flow and an interior floor moat to keep your pet dry. Convenient tie-down strap holes allow you to zip-tie the kennel together for added security during airline travel. The Ultra Vari Kennel® is eco-friendly and meets most airline requirements. Be sure to check with your airline well in advance of your travels to learn about their individual requirements.