The Sawfish™ is a dielectric ultra-light full-frame design that boasts chiseled lines and sleek curvature. Featuring inset TPR on the nose bridge and temple ends, the Sawfish™ is truly adaptable to any environment. PFT - Performance Fog Technology lens: Better than traditional anti-fog! This water-washable, hydrophilic anti-fog lens coating is permanently bonded to the lens to absorb moisture and then spread it consistently, providing clear, fog-free vision Polarized lenses filter out bent light waves eliminating glare, eye fatigue, and decreasing reflection off surfaces such as water, sand, and snow. Variable tint lenses darken when exposed to UV light (outdoors) and return to original tint when UV light is removed (indoors) Meets ANSI/ISEA Z87.1-2020 standards