The bike bag is made of waterproof fabric, you can in peace on rainy , not afraid of wet inside the items and equipment. The bike bag has enough space, clear and portable storage. With a capacity of 2.7L, you can bring enough equipment to meet the needs of long-distance riding and capacity. which is wear-resistant scratch-resistant, tear-resistant and durable. The good partner in your riding. Reflective safety design : Both sides and tail are used bright reflective printing ,more secure in night riding .Bicycle tail lights can be installed. High Wear-resistant and durability. Brand Name: Function: Rainproof Name: Bicycle Saddle Bag Cycling Rear Bag Features 1: Quick release, Water repellent Features 2: Shock absorption & Scratch resistance color:Black Material:TPU+Oxford cloth size:21 x 15 x 12.3cm Package Contents: 1 x Bike bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.