The Pannier DryBag DX is a large capacity, waterproof pannier featuring a sonically welded and fully seam sealed 420 denier and 840 denier exterior. A watertight roll- top closure provides maximum protection from road spray and wet weather. Its quick release Hook and Lock system attaches the pannier securely to the rack and makes installation and removal quick and easy. It is perfect for touring in wet conditions or for daily commuting.