Rainproof cover indispensable protection for the backpack (and the load inside) from soaking during heavy and constant rainfalls. Some types of backpacks include a rainproof cover as standard equipment.
The size of covers matches the exact dimensions of backpacks: 30-40 l, 40-50 l, 50-60 l, 60-75 l, 75-90 l, 90-120 l.