YGS Outdoor Gear 45L Backpack Rucksack Pack Rain Cover Bag Rainproof Waterproof Cover for Outdoor Camping Hiking Travelling Capacity:45L Material: Nylon Oxford Seamless construction for weather-tight protection With elastic design, it is able to adjust the size according to different backpacks. This is great for hunters who carry a pack when hunting. Helps make you more visible, and it keeps your stuff dry.