The minimalist design and weight make this a pack you can carry all day long though the cor13 has no external frame it is very comfortable the padded back with ventilation channels provides efficient air circulation the anatomically contoured shoulder straps and chest strap are individually adjustable and keep the pack close to your body the waterproof nylon fabric is extremely abrasion resistant and gives the pack its low weight 40only 700 g41 helmets may be stowed under the adjustab