"The Suncloud Boundary sunglasses use an Evolve bio-based frame in place of standard petroleum-based plastic, paired with polarized polycarbonate lenses that cut glare and sharpen contrast in bright conditions. The rectangular, wraparound shape holds a medium to large fit, and the lenses carry full UV protection for all-day wear outdoors. What Our Gearhead® Experts Are Saying:""I reach for the Boundary on bright water days specifically because the polarized lenses cut the surface glare enough that I can actually track what's under the surface, not just squint through it."""