This jack wolfskin raincover is made from the same materials as tent flysheets and has a pu coating to offer you a robust yet lightweight waterproof and uv resistant rucksack cover that has an impressive waterproof rating of 4000mm making it ideal for keeping your pack and belongings dry while you are hiking suitable for packs up to 40 litres the jack wolfskin medium rucksack cover is simple to attach thanks to the velcro fastener and drawcord and it still allows full access to the rucksack stra