Smith Optics 2015 Aegis Echo II Elite Tactical Eyeshields - Asian Fit Ballistic impact protection per US MIL-PRF-31013 standard clause 3511, optics and coverage per ANSI Z871 and EN 166 Compliant Thin, moldable alloy temples fit under ear pro without breaking the seal, fast lens exchange with Pivlock technology, and TLT Hydrophilic Megol Temple and Nose and Anti-Fog and Scratch Resistant Coatings on all Lenses 100% Protection from UVA/UVB rays, Compatible with Smith RX System Insert and New infinitely adjustable nose piece for perfect fit