Altura: A WATERPROOF, LIGHTWEIGHT ROLL-TOP BACKPACK IDEAL FOR THE COMMUTE BY BIKE Waterproof, durable, lightweight and highly visible, the Altura Thunderstorm City Waterproof Cycling Backpack is designed for your commuting needs. A smart roll top closure, preventing any rain from getting in, gives you flexible carrying capacity of up to an impressive 30L in a bag that weighs just 600g. The polyester ripstop material with TPU coating is certified waterproof to level IPX6. Combined with sealed seams, you can ride to work with the confidence that your belongings are safe and dry on the wettest days of the year. While a draft venting back system ensures you stay cool on the hot summer days too. External reflective details and light attachment points also help you stay visible on the road whatever time of day you’re out. The bag is well equipped internally too with a padded laptop sleeve to protect from bumps and knocks plus a zipped pocket and key loop to organise your valuables.Please note the roll closure must be rolled 3 times to ensure a waterproof closure. Whilst the waterproof fabric and welded seams provide protection from the elements, this product is not submersible and should not be left sitting in water. We recommend valuables or electronics should be secured in a dry bag inside the main body of the bag for extra security. FEATURESFully waterproof to level IPX6Roll-top closureDraft Venting back system360° reflective detailsPadded laptop sleeve (removable) fits 13”” laptopInternal zipped pocket and key loopLight attachment pointsChest and waist strapGrab handleApprox 30L capacityCOMPOSITIONOuter: 100% Polyester with TPU coating Lining: 100% polyester