Patagonia Backpack 26L in Fatigue Green Arbor. A sturdy backpack from Patagonia, for your inner explorer. The Arbor backpack has many key features the main being the body is crafted from a recycled polyester fabric coated in DWR (durable water repellent) fabric finish repels light rain and snow. There is a large main compartment, with a padded 15" laptop sleeve, a zippered pocket under the flap. The bag measures 18x11x6 Inches.