The Peregrine Flight 18+ is a versatile lightweight daypack with roll-top closure and external stretch-mesh stash pocket. It fits close to the body for day hikes and summit bids. The roll-top closure is weatherproof and prevents debris from entering the pack while accommodating loads of various sizes. The Flight 18+ is light enough to work double-duty as a sleeping bag stuff sack and tough enough to get you to the summit with all the essentials.
Get yourself one here.