Made of 600D polyester cloth + PVC ventilating net, portable and durable * One bigger bag connected with two side bags which can be detached provides more space for storage. The bigger bag with shoulder strap can also be used alone. * Velcro Tape can stabilize the bag for protecting the safety of your articles. * Both side of the bag have reflective strap for safe riding at night. * Dimensions (L*W*H): 8.7"*3"*5.7"