Patagonia Arbor Lid Pack 28L in Black. Whether you're back in the classroom, office, or just looking for a casual backpack, the Arbor Lid Pack is a great choice. This piece is practical with plentiful storage options with a roomy main compartment with laptop sleeve, front zip pouch, and dual buckle lid flap with integrated zip pocket. This piece is also durable and secure, having been crafted from a DWR treated 100% recycled polyester and featuring a drawstring closure to ensure your belongings are kept safe on the go. The pack has a padded posterior and adjustable straps for enhanced comfort.