ROCKBROS is an original brand founded by cycg enthusiasts. The goal of ROCKBROS is to offer high - quality products at an affordable price to every customer who loves cycg and outdoor sports. ROCKBROS Waterproof Saddle Bag for Mountain Bikes and Road Bikes Product Details: Brand: ROCKBROS Material: PU composite material Color: Black Weight: 173 g Capacity: 1.5 L Size: 21 * 8.5 * 8 cm Installation: Easy installation with hooks and Velcro If you encounter any problems or have any questions, please do not hesitate to contact us. We will provide you with the best possible solution. Water - This ROCKBROS bicycle bag uses a water - PU composite material, which perfectly protects your items in rainy and extreme environments. Large Capacity This bicycle bag has a large capacity (S: 1L, M: 1.5L). You can put many things in it. Fixed Light There is a flap on the back where you can attach a mini - taillight. Note: Our products do not include this lamp.