Banjo Brothers' Medium Seat Bag is perfect for carrying gear on any length ride. And if you're going big, it expands to haul even more gear. It's made from heavy-duty 840-denier nylon with a wide-mouth opening for easy access. And you've got 360 degrees of visibility with reflective accents and a rear tab for a light. - Weight: 5 oz. - Dimensions: 6.75" L x 4" W x 3" H unexpanded - Capcity: 65-81 cubic inches - Heavy duty 840 denier nylon construction - Wide-opening design for easier access - Flap hinges up from bottom to keep contents in place - 360 degree reflective accents - Web loop for light