Nument(TM) 35-50L Polar Backpack Waterproof Cover Dust Cover Rain Cover-army Green 35-50L polar Backpack waterproof cover Waterproof,Don't worry about outdoor rain With elastic design, it is able to adjust the size according to different backpacks The waterproof cover,Strong and the protection of goods not wet Specially reinforced, keep your backpack and belongings dry from rain, mud and dust.Light, comfortable, durable.Light, comfortable, durable