Winstory Waterproof Travel Hiking Outdoor Sport Backpack Camping Dust Rucksack Rain Bag Cover 30-40L This water resistant cover protects your pack and its contents from the elements. Portable to carry when Travelling Hiking Camping and other outdoor sports Can be free folded in the sachet, perfect for outdoor, travel, riding, climbing Material: Durable Waterproof Nylon Suit for 30-40L of backpack