Perfectly sized for riding a bike and finely tuned to hold a day's worth of gear, the Half Mass Messenger Bag from Patagonia is padded on the backside and along the contoured base to protect contents and provide structure. Inside, a removable padded computer sleeve cradles a 17-inch laptop off the ground, and can be paired with the bag's removable waist strap to create an independent laptop sling. The cover flap overlaps the sides of the bag to keep out rain; its pocket closes with a water-resistant zipper. External side pocket stows a cell phone, keys and power brick. With a topside carrying handle, adjustable shoulder strap, stowable waist strap and a reflective strip for better visibility in low light. Made from 600-denier 100% recycled polyester with a polyurethane coating and a Deluge