One of Calcutta's most popular frames, Calcutta's Sancho sunglasses will make a powerful style statement no matter where your adventures take you. Calcutta's Sancho sunglasses boast complete 100% UV protection with anti-flaking polarized lens coating that resists corrosion. 1mm Triacetate polarization. Fade-resistant frame with an integrated hinge built to last for repeated use. 1 year limited warranty.