The Topeak DX Trunk Bag is designed for commuters, tourists, and fitness riders. The medium capacity trunk bag is ideal to carry food, clothes, and camera equipment. The DX trunk bag features a main compartment that is two sided, zippered, and expandable for extra capacity. The 600 Denier nylon is extremely light weight and weather resistant. Other features are carrying handle and shoulder strap for off the bike use, reflective strip, and tail light holder. The MTX Trunk Bag DX is compatible with Topeak's MTX QuickTrack racks. 600 Denier Polyester with Dupont coating is extremely light weight, durable , and weather resistant. Molded panels are light, stiff and weather resistant. Two stage expanding top for extra capacity. Two zippered side pockets. Compatible with MTX QuickTrack racks. Carrying handle and shoulder strap for off bike use. 3M Reflective strip and RedLite mount for increased night time visibility. Compartments:1 Divided Main, Two Side Zippered, Multi Expanding Top Elastic Top Bungees to keep your extra cargo strapped to the top of the bag. Size L x W x H: 36 x 25 x 21.529 cm14.1 x 9.8 x 8.511.4 Weight 1020 g 2.25 lbs Capacity 12.3 L 750 cu. In.