Osprey narrowed down the category of covers by focusing on visibility and a firm fit for urban use. The small Hi-Vis Commuter Raincover S features reflective strips and a print around the perimeter to make the backpack more visible in twilight and rainy traffic. The circumferential clamping cover tightly wraps around the body of the backpack and holds even when moving. The cover is made of durable ripstop nylon with taped seams and a drawbar for adjustable circumference, suitable for backpacks 20-35 l. PFAS-free DWR impregnation provides moisture protection without overdoing it. A simple, purposeful solution for your daily commute in the city.