Combining Smith Style & Smith Performance the Interlock Trace sunglass is the perfect choice for casual wear or outdoor excursions. Polarized TLT Carbonic lenses block 99.9% of reflective glare and megol temple pads ensure a secure fit. The Trace also features a Grilamid TR90 frame and medium face fit, both of which ensure lasting comfort & durability. 14 different replacement lenses to choose from and as always the Trace is backed by Smith's lifetime warranty.