The Attack MTB ChromaPop Sunglasses sport impressive coverage, durable materials, and optimized tints for riding off-road. They protect our eyes from errant trail debris and the sun's rays. Moreover, we also get a sharp field of vision thanks to ChromaPop technology. Smith provides two of its flagship lenses, one that's a darker tint for more exposed trails and a low light Amber lens when deep under a canopy of trees. Both tints reduce color confusion while filtering harmful UV rays for a crisper field of view and better color contrasts. The lens shape increases coverage area for added protection from the wind, light, and debris, while the partial frame front and strategically placed vents integrate with Smith cycling helmets for a gap-free fit and enhanced ventilation for fog-free performance. Lastly, these sunglasses are equipped with Smith's quick-release MAG interchangeable system and come with a zipper case and microfiber bag for protection for when you're not wearing them.