The redesigned Patagonia Half-Mass features a double overlap flap closure that increases water-resistance, an easy-to-adjust shoulder strap and a repositioned zippered flap pocket for easier access. The padded, suspended computer sleeve holds a 15-inch laptop off the ground. On the outside, you'll find a large elastic stuff pocket, a water bottle pocket and a stowable waist strap. The bag is made from tough, polyurethane-coated 1,680-denier ballistics cloth nylon and 150-denier polyester, both with a DWR (durable water repellent) finish.

• Main compartment is padded on the backside and along the contoured base to protect contents and give the pack structure; Large elastic stuff pocket holds jacket or sweater; Padded, fully suspended computer sleeve holds 15-inch laptop safely above ground; Internal zippered security pocket secures valuables; Outside pocket on cover flap is accessed along the top edge via water-resistant zipper; External side pockets for easy-access to cell phone, keys and power brick
• Prismatic lining makes contents easy to find Adjustable shoulder strap for stability and comfort has adjustments that eliminate hanging excess; Detachable waist strap secures bag for serious pedaling stows when not needed; Topside carrying handle
• Double-overlap closure improves water-resistance; Reflective strip improves visibility in low light
• 12-oz, 1,680-denier ballistics cloth nylon. Lining: 150-denier polyester. Both are coated with polyurethane and DWR (durable water repellent) finish