Waterproof Bicycle Bag Full waterproof seamless design keeps your items completely dry even in heavy rain during long cycling trips. Large Capacity Foldable Bag Size L（28L unfolded/18L folded）/Size M （20L unfolded/12L folded）space fits helmets, water bottles and gears, meeting your different storage needs for daily rides or tours. Quick Release Buckle Reinforced quick-release buckle allows tool-free installation/removal in seconds, saving your time before riding. Reflective Logo For Night Riding Double-sided reflective logos boost visibility in dark environments, keeping you safer during night cycling. Adjustable Multifunctional Bag Fits various bike rack sizes; detachable shoulder strap lets you use it as a handbag or shoulder bag when off the bike. Size L（28L unfolded/18L folded）Information Size M （20L unfolded/12L folded）Information bicycle rear pannier bag; waterproof bike storage bag; large capacity cycling bag; foldable bicycle cargo bag; quick release bike rack bag; reflective night riding bike bag; adjustable bike bag; multifunctional bicycle pouch; waterproof cycling touring bag; bike rear storage bag; durable bicycle pannier; cycling gear storage bag; bike rack cargo bag; foldable bike travel bag; safe night cycling bag; waterproof bike accessory bag; adjustable rear bike bag; multifunctional cycling storage bag; bike pannier with quick release; large foldable bike bag