Features: 1.Large Capacity: Max 13L large capacity, large enough to keep your essentials well organized. the internal patch pocket makes the space effectively used. 2.Higher Visibility and Safety: the reflective strip increases nighttime visibility and Improve safety. 3.Easy installation: fastener strap for easy and quick installation on all types of bicycles with a rear seat, such as mountain bike, road bike, etc. 4.Multiple Functions: with carrying handle and adjustable shoulder strap, the bag can be used as a handbag and shoulder bag as well. 5.With Waterproof Cover: The waterproof cover can completely protect all the items in your bag without fear of rain and snow. Specifications: Mtaerial: 600D Oxford cloth Capacity: 27Lexpanded Color: blue/black/red Net Weight: about 670g Notice: Due to the different monitor and light effect, the actual color maybe a slight different from the picture color. Please allow 5-30mm differs due to manual measurement. Package List: 1 x Bicycle Rack Bag