Crooked Horn Outfitters Original Slide N Flex Bino System, Black The Bino System uses your shoulders instead of your neck to support the weight of your binoculars and holds them tight to your chest, eliminating bounce while hiking, riding ATV's, horses, etc. Elastic straps allow the binoculars to slide up and flex out while in use and is fully adjustable to work on all sizes of binoculars, cameras and rangefinders.