Expandable 17-29L Capacity This bicycle pannier bag expands from 17L to 29L, fitting more gear for long rides, commutes, and travel. Water-Splashing Protection Made of waterproof Oxford cloth, it keeps your items dry in light rain and splashes during cycling. Convertible to Backpack Easily converts to a backpack with hidden straps, perfect for carrying gear off the bike for errands or hiking. Stable Triangular Installation The triangular fixed design with clips and velcro keeps the bag stable on rough roads, preventing shifts. Enhanced Night Safety Reflective strips boost visibility during night rides, keeping you safe on the road. Bicycle Pannier Bag; Waterproof Bike Bag; Convertible Backpack; Cycling Rear Seat Bag; 17-29L Expandable Bag; Commute Cycling Bag; Travel Bike Pannier; Outdoor Sports Bag; Reflective Cycling Bag; Foldable Bicycle Bag; Triangular Fixed Bag; Bike Trunk Bag; MTB Rear Bag; Road Bike Pannier; Waterproof Cycling Backpack; Bike Commuter Bag; Hiking Bike Bag; Night Safety Cycling Bag; Multi-functional Bike Bag; Bicycle Accessories