Patagonia Vertical Mass Backpack (Spring 2009) - Black - in stock now. The Vertical Mass Backpack by Patagonia is perfect for commuting, travel and play and made with environmentally friendly recycled fabric. Features: Zippered main compartment has self adjusting suspended computer sleeve that holds laptop safely above the ground Interior mesh sleeve pocket Zippered pocket lined to protect sunglasses or electronics Zippered front pocket for magazines, airline tickets Zippered organizer pocket with removable key chain Stretch-woven water bottle pocket Shoulder straps have slots for clip-on attachments Vertical and horizontal grip handles Stowable waist-belt Sternum strap with safety whistle Holds 17-inch laptop and smaller Fabric: Outer fabric: 12-oz 1200-denier polyester (100% recycled). Lining: 200-denier polyester. Both are coated with polyurethane and a DWR (durable water repellent) finish