The Topeak Wedge Pack II (Medium) saddle Bag is an updated and improved version of their popular traditional wedge pack. The Wedge Pack II features durable 1000 denier, a wrap around zipper, and a zippered expanding main compartment for added storage. There\'s a 3M reflective strip and a convenient light clip for extra safety in poor light, and the bag can be extended with the pull of a zip, to accomodate bulkier items. Includes rain cover: Tool-free mounting with QuickClick - slide and click and the bag is secure Dupont Teflon Coating Capacity: 0.95 -1.25 L (58-76 ci) Size (LxWxH): 16.5 x 10.5 x 12.3cm (6.5” x 4.1” x 4.8”) Weight: 152g (5.35oz) QuickClick is Topeak\'s clever quick release mounting system that allows fast and easy tool-free mounting and removal. A simple slide and click, and the bag is secure. A simple push of a button unlocks the system for easy removal.