Granite Gear Vapor Day Backpack The Granite Gear Vapor Day Backpack is perfect for the people who would like to travel light. If you have spent your time and energy getting your pack weight down to 20 pounds, the good news is that your ideal pack is here at a valuable price. It has the nylon shell that gains support and rigidity from your sleeping pad. Simply drop in a rolled pad and let it uncoil to push against the bag, and pack your gear inside the roll. The Virga has nicely padded shoulder straps and a 1.5-inch webbing hip belt. It has a spindrift collar that is extra-long allowing the pack to expand for resupplies and contract as they are consumed. The Granite Gear Vapor Day Backpack is built for going fast, far, and high.