Butler Creek Alaskan Magnum Sling Neoprene Black (No Swivels)Features Soft, flexible closed cell neoprene with comfort stretch backing Dramatically reduces felt weight Non slip grippers keep it firmly in place Includes shell holders The Butler Creek Alaskan Magnum Sling features stretchable construction and soft padding which soak up the bounce you get with traditional slings reducing felt weight up to 50% so even the roughest hikes are smooth on your shoulder.