Whether you're headed off for a full day of class or blowing off those classes for a full day at the beach, the Dakine Kat Backpack has your back. Made from a durable cotton canvas fabric and with a polyester lining, this uniquely-printed knapsack has a fully-padded exterior pocket for your tablet, non-padded interior for your laptop and a downright roomy interior for books, towels and a bagged lunch. Adventures are messy. If your Dakine bag gets dirty they 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. This lifestyle backpack from Dakine features: Laptop sleeve, fits most 15'' laptops, top flap with adjustable web and buckle closure, adjustable web shoulder straps, fully padded exterior zippered iPad pocket, front slip pockets, polyester lining, limited lifetime warranty. Dimensions: 1000 Cubic incheses (16 liters), 15 x 13 x 4.5'' (38 x 33 x 11cm). Material: Cotton, Canvas, Polyester.