With its classic keyhole bridge & unique interior kick-up feature that lets you clip it to your shirt Oakley Latch was inspired by trailblazers from the world of skate & this SQ edition blends the sharp look of rectangular lens shaping with all that originality & convenience. Torch Iridium Light Transmission 17% Light Conditions Bright Light Contrast Neutral Base Lens Color Grey Features Built-in feature that lets you latch it to your shirt Three-Point Fit holds lenses in precise optical alignment while eliminating pressure points Plutonite® Lenses offer top UV Protection filtering 100% of all UVA UVB UVC & harmful blue light up to 400nm O Matter stress-resistant frame material is both lightweight & durable for all-day comfort & protection INTEGRATED TECHNOLOGIESHigh Definition Optics High Definition Optics® (HDO®) is a collection of patented technologies that allow Oakley eyewear to meet or exceed the testing standards of the American National Standards Institute for optical clarity visual fidelity & impact resistance.