For the urban adventurer in town or on campus, the Marmot Calistoga Daypack is one to consider. With its padded laptop sleeve, padded harness and lots of pockets for organization, the Calistoga is the right choice. Large main compartment. Padded laptop sleeve fits most 15 laptop computers. Zippered pocket with organizer and key clip. Additional front stash pocket. Two external water bottle pockets. Padded shoulder harness. Sternum strap stabilizes your load. Durable YKK zippers. Material: 420d 100% poyester big ripstop with 600d 100% polyester reinforcement. Wt. 1 lb. 8 oz. 670 g. Volume: 1830 cu. in. 30 liters.