SMITH POLARIZATION cuts glare off of horizontal surfaces like snow, water and asphalt and reduces visual acuity which causes eye fatigue. We precisely align the polarized visual layer inside our lenses to filter out 99.9% of this “visual static”. FRAME: Cellulose propionate frame material Fit: Small-med fit/small-med coverage; Adjustable wire-core temple; 6 base frame; Barrel hinges. INCLUDED: Smith Archive Collection fleece bag Lens width: 60mm Lens height: 42mm Bridge width: 13mm Temple length: 140mm