Take to the sky with your mind at ease with petmate"s sky kennel. perfect for airline travel, each kennel features a heavy duty plastic shell, durable wire doors that interlock for added security, wire ventilation windows to promote healthy air flow and plastic wing-nuts that won"t corrode for durable assembly. sky kennels meet the requirements for airline travel and come with "live animals" imprinted directly the exterior for added awareness. meets most airline requirements. be sure to check with your airline well in advance of your travels to learn about their individual requirements. the sky kennel is eco-friendly. this kennel is for use of dogs from 25 to 30 pounds.