Thule RoundTrip Boot Backpack Tarpaulin/900D Polyester Back panel access door flips down and doubles as standing mat when changing into boots Heat-molded, crush proof SafeZone compartment protects your goggles, sunglasses, iPhone, portable electronics and other fragile gear Heavy duty tarpaulin bottom provides added protection Built in loops let you quickly connect the Boot Backpack to Thule's RoundTrip rolling ski and snowboard bags Two spacious side pockets store outwear, gloves and accessories