The Trek 26L comes from a deep lineage of top loaders, but has picked up some key evolutionary features making it the perfect pack for daily adventures. The side access makes it easy to drop a shoulder strap and access the padded laptop sleeve or anything else you can fit in the main pocket, as long as it's under 26 liters. If your bag gets dirty, Dakine recommend hand washing with mild soap (like Nikwax Tech Wash), cold water and a soft bristle brush. If hand washing is not going to do the trick, use a front loader washing machine. To ensure your backpack doesn't get tangled, place inside a pillowcase or mesh bag before washing. Always use cold water, mild soap and run on a gentle cycle. Never bleach your pack. Hang to dry in a warm but shady place, ensuring both inside and out are dry before storing. Details: 600D polyester, poly-blend canvas, PU suede or cork, padded laptop sleeve, fits most 15'' laptops, interior mesh pocket, breathable shoulder straps, side access, adjustable sternum strap, limited lifetime warranty. Dimensions: 1606 cubic inches (26 liters), 20'' x 12'' x 7'' (51 x 30 x 18cm). Material: Polyester.