Airline approved pet carrier. The Sport Wagon Bag is one of our Sportiest and safest pet carriers. It can be opened or closed from inside with an easy Velcro lock, it has large rear, front and sides pockets, wide top opening, safety leash, honeycomb polypropylene bottom panel, built-in reflectors, ultra light structure, 4x4 buckle system, handler and a wide shoulder strap. It can also be used with the STS (sport trike stroller), the USBBC (a bike connection for city bikes), the USBBL (a bike connection for mountain bikes) and the USBMB (the motorbike connection). SWB comes with a comfort mat included.