Used once for a two hour flight and worked great! Fits under seat! No stains, rips or tears Sherpa Original Deluxe Pet Carrier for Dogs & Cats is perfect for traveling in style and comfort by plane or car, for an adventure or just a trip to the vet. The Sherpa pet carrier has a patented spring wire frame which allows the rear end of the carrier to be pushed down several inches to conform to under-seat requirements. Mesh windows for ventilation and top and side entry with locking zippers for safety are also included with the Sherpa. The pet carrier size is large and for pets up to 18" L x 11" H