The Granite Gear Lid is designed to work with our ultralight lidless packs including the Virga, Vapor Trail and Nimbus Ozone as well as the new Alpine Vapor. For the ultralight packer that just canít go lidless this flat lid has a stretch top that expands to stow the small stuff you need at your service. It also acts as a cover to shed the elements. Use the lid to carry some extra food or stow your necessities. The Granite Gear Lid is a perfect accessory with your old or new Granite Gear backpack.