AO Eyewear Original Pilot Sunglasses 52mm Frames with Bayonet Temples and True Color Grey Glass Lenses (OP52S.BA.TC) metal Made in USA Gold Steel Alloy Frames 52mm for Smaller Faces 98% UVA/100% UVB Protection Bayonet Temples Made in the USA. One Year Manufactures Warranty Issued to millions of U.S. soldiers, sailors, marines and airmen since 1964 Distortion free, toughened and polished, True Color Grey glass lens Engineered to rigid military specifications The 52-mm frame with bayonet temples is perfect for smaller faces