This handy trunk bag offers 11 liters of waterproof storage and mounts to any front or rear bike rack. Roll-top closure and welded seams provide waterproof protection for your gear. Exterior translucent pockets allow safety light to be used and stored in one convenient location. Roll-top closure doubles as a convenient carrying handle. Simple hook and loop attachments provide secure rack mounting and quick installation/removal. Designed to perfectly fit between two Thule panniers. Fits best on Thule racks, but will work on virtually any bike rack. Dimensions: 12.8 x 5.5 x 14.4 in. Volume: 671 cu in. Weight: 1.2 lb. Waterproof: IPX4. Material: High tenacity TPU coated nylon (PVC free).