Heavy-duty reinforced polyester fabric design reinforced with an arched steel frame Arched steel frame keeps the bag in shape, no matter how much gear is in it Consistent, gapless 1" weatherproof seal keeps contents dry and dust free Zipperless design, fully removable lid allows access to the bag from the front, back, left or right sides; remove the lid for unobstructed access to any part of the bag Bag includes top bungee straps, two expandable drink holders, internal organizer pockets, front pockets and a removable padded seat. BAG REAR ARCH SER. BK