A Dura-Grip rubber armor coating helps protect a binoculars’ chassis. Moreover, it offers a non-slip grip, allowing you to handle your binoculars easily and worry-free even in the wettest settings. It comes in handy particularly in rugged conditions where your binoculars will really take a beating. An excellent example of a pair of binoculars with a Dura-Grip rubber armor coating is the Bushnell TROPHY 10X42 BONE COLLECTOR Binoculars. Learn more about these optics in this review.