Osprey's Ultralight Pack Liner is a waterproof bag ideal for protecting your gear from moisture in your backpack. Its water-repellent 40 denier high-tenacity nylon lining and sealed seams keep your gear dry and dust-free. The big plus of this bag is its square base. So your backpack will be easier to fit out, and you won't lose any space thanks to the rounded edges. These ultralight bags are available in 3 sizes:

• 36 liters: for backpacks from 30 to 50 liters


• 58 liters: for backpacks from 50 to 70 liters


• 76 liters: for backpacks from 70 to 100 liters

Features :

• Coated fabrics and waterproof seams


• Folds to close completely watertight


• Rectangular shape for efficient packing