This 28-liter backpack uses rucksack functionality in a three-compartment bag with plenty of storage for a variety of endeavors because the best packs are multipurpose. Ergonomic, mesh-lined shoulder straps allow all-day wear, wherever you take this pack, or it takes you.100% Polyester, Dimenstion : 18.5 x 12.5 x 7in (47 x 32 x 18cm). Volume : 26 Liters, Large main compartment with magazine sleeve,Front compartment with internal mesh pockets,Water bottle pockets