UPD%u2122 is a lightweight, subtly styled, unisex frame with stainless steel hinges offering maximum comfort and protection for sport or street. The injection-molded TR-90 frame supports 8.25 base curve SR-91® polarized lenses featuring Kaenon's proprietary Light Transmission Control%u2122 (LTC%u2122) technology and our own Glare 86® polarizing element.