About Us: ROCKBROS is an original brand founded by cycling enthusiasts. The goal of ROCKBROS is to offer high - quality products at an affordable price to every customer who loves cycling and outdoor sports. ROCKBROS Bicycle Seat Bag Waterproof Bicycle Saddle Bag with Quick - release Buckle for MTB and Road Bike, 1.8L Product Details: Brand: ROCKBROS Material: 210D Nylon Weight: approximately 120 g Size: 24 * 11 * 8 * 10 cm Capacity: approximately 1.7 L Color: Black Side Pockets You can neatly store everything in the two side pockets. Night - time Safety You can attach a taillight to the back of the bag. (Note: Taillights are not included.) Hidden Zippers Prevent zippers from colliding with each other and making noise.