You'll love the super-functional rolltop design of the Milly backpack. The pack's spacious main compartment is accessed through the rolltop opening, which rolls to create more or less volume while also providing weather resistance. The main compartment, complete with a padded laptop sleeve is easily accessed on the go through a practical side access while the structured front pocket includes plenty of organization. This simple, slimmed down style is ideal for the minimalist rucksack lover. Details: Fits most 15'' laptops, roll-top with adjustable metal hook closure, side access entry into main compartment, organizer pocket, padded bottom panel, limited lifetime warranty. 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. Dimensions: 1460 cubic inches (24 liters), 18'' x 13'' x 7'' (46 x 33 x 18cm). Material: Polyester.