Sherpa Element Duffle Pet Carrier Perfect for traveling in style and comfort by plane or car, for an adventure or just a trip to the vet Patented spring wire frame allows the rear end of the carrier to be pushed down several inches to conform to under-seat requirements Three mesh windows for ventilation, top and side entry with locking zippers for safety, padded hand carry strap, seat belt strap, machine-washable faux lambskin liner Side pocket for convenient storage of treats, leash, bags, or anything else your furry friend might need on the go Approved for use on most airlines and included in Sherpas Guaranteed on Board program Select the carrier size based on your pets measurements first, then by weight, and allow enough space for your pet to change positions while inside the carrier