Vintage Canvas Larger Backpack This well made, Heavyweight Canvas Bag is made of 100% "Cotton Duck" Stone Washed Canvas material. Cotton Duck differs from other heavy cotton fabrics such as denim due to it's tighter weave which gives it added strength. The tighter weave also makes it more water resistant than other fabrics. We recommend using a waterproofing spray on it occassionally to retain it's water resistant characteristics. It is made of eco-friendly natural cotton canvas material, which is a renewable resource. It won't be in a landfill for 20,000 years like bags made of plastic/nylon. With dimensions of 18" X 13.5" X 7" it has approx 1700 cu in. of space for all your gear. It is great for use as a general purpose Backpack whether you're hiking through the woods on a camping trip, lugging your stuff across the Urban landscape, or as a School Book Bag. We offer a more compact version of this backpack in our store. This Classic Heavyweight Canvas Backpack is available in the following colors: BLACK EARTH BROWN KHAKI TIGER STRIPE CAMO OLIVE DRAB (OD) GREEN Use the drop down window above to select your color. Visit our Store to purchase other bags including Backpacks, Duffle Bags, Map Cases, Computer Cases, Totes, Travel Bags, Cargo Bags, etc. Just click on this link - http://stores.ebay.com/FootlooseUSA. This Backpack has the following features: Heavyweight Natural Canvas Large Main Compartment Two Elastic Side Pockets with Tie Downs Three Outside Pouches Adjustable Heavy Duty Shoulder Straps Reinforced Heavy Duty Stitching Hang Up Loop 18" X 13.5" X 7" Dimensions Imported Other styles of Rucksacks and Backpacks in various colors are available in our Store. Just click on this link - http://stores.ebay.com/FootlooseUSA As with all of our apparel/merchandise, these bags are new, first quality, and direct from the manufacturer. We stand behind every item we sell. We also carry military themed, motorcycle, camo and hot fashion items in our Store including Footwear, Jackets, Shirts, Hoodies, etc. Just click on this link - http://stores.ebay.com/FootlooseUSA These items brought to you by a retired Navy Senior Chief Petty Officer (E-8).