5-STAR SAFETY RATED BY THE CENTER FOR PET SAFETY, a non-profit consumer advocacy organization. APPROVED FOR USE ON MOST MAJOR AIRLINES. Review your airline's regulations regarding pets on-board before traveling. CRASH TESTED SUCCESSFULLY FOR PETS UP TO 20 LBS. Depending on the animal and build, product may be best suited for dogs up to 16 lbs. Please consider your pet's build and product dimensions for most comfortable fit. HEAVY DUTY HARDWARE, BALLISTIC NYLON AND INDUSTRIAL STITCHING. Especially designed to utilize the seat belt latch and shoulder strap and to assist in restraining the carrier during car travel. Durable seat belt latch keeps carrier in proper position. Employ the shoulder strap around the headrest to aid in stability. Sturdy structure won't collapse when seat belt is applied. EASILY TRANSFERS IN AND OUT OF VEHICLE. Padded shoulder strap and easy tote handle options. COZY REMOVABLE COMFORT PAD IS EASY TO CLEAN AND MACHINE WASHABLE. 2 zippered entrances for easy access. Multiple mesh windows for maximum ventilation. Folds flat when not in use.