Black Diamond Demon Duffel 2010. For short approaches and casual days at the sport crag, leave the alpine pack in the closet and load up the Black Diamond Demon Duffel. This deluxe duffel pack features a full-length zipper that gives you full access to your draws, rope, snacks, and other climbing essentials. An internal zip pocket stashes your keys and wallet for the day, and the frame sheet and padded back panel support your gear on the hike in. Black Diamond also added tough grab handles and tuck-away shoulder straps for duffel-style carrying.