The BikeTek Waterproof and Reflective Rucksack Cover has a universal design which fits most small and medium sized backpacks.Universal fitting rucksack coverFits most small/medium sized backpacksHi-Vis yellow material with reflective pipingWaterproof coated nylonOuter mesh pocketThe BikeTek Waterproof and Reflective Rucksack Cover has been made with a high-vis yellow material and reflective piping which increases low-light visibility while the coated nylon construction keeps the water out.In addition, there is also an outer mesh pocket for any 'quick-to-grab' documents / necessities.