The featherweight Cloudburst 15 combines the benefits of a waterproof single-compartment packsack with a lightweight backpack. It is the perfect companion for day trips, climbing, biking or water sports. The roll-top closure not only keeps contents dry and provides quick access to the main compartment. The efficient, redesigned front shock cord holder ensures good compression and offers attachment options for a jacket or helmet. The wide mesh shoulder straps are vapor permeable, lightweight and quick drying. For maximum comfort during all activities, the Cloudburst features a foam insert at the back. Taped seams and recycled PFC-free Nylon fabric with a water column of 7000 mm protect against moisture. Practical, roll-top closure Extremely versatile, lightweight and stowable Airy mesh shoulder straps, removable, waist strap Revised single-pull, zig-zag shock cord secures helmet, jacket, etc. EVA foam back pad for enhanced comfort Fully taped seams Great for travel, watersports, day trips, biking, and leisure Specs Volume 15 L Weight 8.8 oz Dimensions 16.5 × 7.1 × 5.9 in Hip Belt Range 8 - 45 in Torso Size One Size Load Limit <11 lbs Materials Body Recycled 70 D taffeta nylon, PU coated (white pigment), 7‘000 mm water column, fully seam taped, bluesign certified, PFC-free Frame EVA foam back pad Note Roll-top closures, while considered waterproof against precipitation when rolled at least 3 times, are not waterproof when submerged. The pressure of submersion is too great for any roll-top pack or stuff sack and water will find its way inside.