Topeak Backloader Seatpack - 6L The Topeak Backloader 6L Seat Pack is a durable and highly resistant rear pack that allows the adventurous rider the ability to ride out into the wilderness on a long day with all the kit they need to go far. Offering a lightweight polyethylene and nylon construction to assure you of a highly durable fabrication. Water resistant, this bag features a roll-top closure to assure that your valuable essentials keep dry, this bag includes a waterproof inner bag is a to make sure that no matter what conditions are, you can be sure of a warm and safe spare change of clothes. An air release system ensuring that you can compact your load down to the very smallest space possible, this seat pack holds up to 6 litres of storage. With a quick releasing and tool-free mounting system, this bag is affixed sturdily within seconds and even offers a safety light clip for mounting that essential rear light.