The proviz360 rucksack cover like all other proviz360 products is constructed from ce en471 a super reflective material the proviz360 rucksack cover is dual layered to give you unparalleled water resistance and the reflective detail helps your position to be more easily identified on the road the proviz360 rucksack cover is attached securely using elasticated cords and press stud fasteners the edges of the rucksack are elasticated to create a secure fit around your rucksack of all sizes up