Smith Pivlock Echo Elite Sunglasses 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 Super thin, moldable alloy temples fit cleanly under ear pro without breaking the seal, Free Float lens technology and infinitely adjustable nose pads Tapered Lens Technology corrects distortion, Hydrophilic megol nose & temple pads, Anti-fog & scratch resistant coating, and 100% UVA/B/C protection