Water resistant 600D reinforce polyester fabric, wear and tear resistant, and easy to scrub. Quick attach and remove saving time for people who go to work or school and everyday off-bike use. Adjustable design fits most bicycle racks. The reflective strips on both sides of the bike bag ensures night time visibility. It is convenient for short trips and long distance journeys. Each pannier has a rigid back panel, so you will not slow down and wear the bag due to rub.