UPD™ 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™ (LTC®) technology and our own Glare 86® polarizing element. Note: the Matblack/ Grey LTL28 and the Tortoise/ Yellow LTL35 UPD Sunglasses are discontinued. All sales are final.