Salzmann 3M Reflective Backpack Cover, Rucksack Cover, Bag Rain Cover, High Visibility, Waterproof, Rainproof, Ideal for Cycling and Running Made with 3M Reflective Material. Reflective rate: 550cd/lux. Offers visibility to drivers at night from up to 200m away. Our backpack cover is completely waterproof, it will keep your bag and it's contents dry in the rain. We now use new and improved material from 2014. Since 2017, the chevrons on the backpack cover are also reflective.