ANSI Z87.2+ certified for lens retention and high-mass impact resistance; SPY+'s revolutionary therapeutic HAPPY Lens Tech is scientifically tuned to boost mood and alertness while enhancing color and contrast, providing a truly life-changing visual experience; ARC (Accurate Radius Curvature) polycarbonate lenses are tapered to follow the natural curvature of the eye, providing crystal-clear distortion-free vision while reducing eyestrain; Available with polarization, which blocks over 99% of surface glare and is layered and sealed within SPY's lenses to prevent scratching, delaminating, and hazing of your polarized filter; Constructed from Grilamid NZ, a lightweight and durable frame material that can handle a load of beatings; Comfortable rubber nose pads and temple tips provide a secure fit no matter how hard you sweat; Snap pin hinges provide a secure, comfortable fit; 100% UV protection reduces eye fatigue and long-term sun damage; Scoop ventilation system increases air flow and decreases fog-causing sweat and moisture