AO Eyewear Original Pilot 55mm Sunglass with Bayonet Temples Metal Black Steel Alloy Frames, True Color Grey Glass Lenses 55mm for Medium Faces 98% UVA/100% UVB Protection Bayonet Temples Made in the USA. One Year Manufactures Warranty Distortion free, toughened and polished, True Color Grey glass lens Engineered to rigid military specifications The 55-mm frame with bayonet temples is perfect for smaller faces