- Polyester Material. Each bag has 4 buckles, 4 bands, 2 shoulder straps. -Modular Design. Through the connection of buckle and hook, each bag can be combined to achieve 2 in 1, 3 in 1, 4 in 1. - Fully Waterproof. Inner bag is removable, no need to worry about riding in rain. - Multiple Uses. Motorcycle pannier bag or fuel tank bag or connect the shoulder strap to use it as a shoulder bag or backpack. - Waterproof zipper cap prevent rain intrusion; hook on loops can connect to other bag; brand buckles are solid and durable; webbing can hang objects; silver reflective logo makes it safer to ride at night.