A supportive harness that dramatically reduces perceived weight of your binos. The Butler Creek Bino Harness Bone Collector spreads the perceived weight of your binoculars via four elastic straps and a form-fitting X panel. Be sure to see our full line of Butler Creek binocular accessories for more useful binoculars accessories for more improvements to your binocular use including binocular straps and binocular harnesses. Features of Butler Creek Bone Collector Bino Harness:Bone Collector logo. Easiest on and off. No weight on your neck and supportive elastic straps.