Waterproof Backpack Rain Cover, 8000mm proof Hiking Camping Traveling Black Sz L

backpack cover features lightweight and durable. The material of Joywalker backpack cover is very complicated, it's compressed by 4 kinds of fabrics. Each of their function is different, outer fabric is waterproof and inner fabric is to enhance the structure of cover. Even the backpack cover consists of 4 kinds of fabrics, but the thickness is ultrathin.