Timbuk2 Bicycle Seat Pack, Large SizeBallistic nylon is the new feature of the Timbuk2 Bicycle Seat Pack. This Ballistic Nylon offers extended durability, for lasting quality. Rubberized piping, with hook and loop straps attach securely to any bicycle seat post. A king ring tether inside ensures you have all you need for a day cycling out in the countryside, or trekking through the highlands. Including the capability to hold all your valuables, such as Identification card, power gel, keys and cash, it is an ideal accessory. Choose your color and style. Additionally Timbuk2 products have a lifetime warranty; they stand behind the legendary quality and craftsmanship of all their products. So if you want performance, choose the Timbuk2 Bicycle Seat Pack, Large Size. You can never go wrong with Timbuk2.