Soft thermoplastic rubber tipped temples grip lightly to ensure proper location of the optics without slippage. > <Aluminum-magnesium frame construction generates proper strength and optical stability through a hybrid lightweight metal alloy.Hidden spring hinges flex to ergonomcally fit a wide variety of head and face shapes.Lightweight construction and proper weight balance guarantee long wearing comfort without pressure points or fatigue.Micro-engineered lenslocks securely retain lenses without undue stress or distortion of the optics.Adjustable floating nose pads articulate in 3 dimensions to properly fit and comfortably secure eyewear in place.Wide format lenses create a panoramic viewing field for high resolution viewing.