There's not much worse than finding out our spare socks are soaked and our sleeping bag feels like it's full of pancake batter. That's why we cover our packs with the Osprey Ultralight Raincover when the storm cuts loose. This waterproof cover comes in multiple sizes to fit different-sized packs and features a full wrap-around cinch with a secure hip belt and harness attachment for added security. Weighing just 3-4 ounces, the UL Raincover stuffs into its own pocket to pack down small when the sky clears.