With ultra-thick sides, a square frame, and a front that commands attention, there's nothing quiet about Cyrus sunglasses. Available with our revolutionary Happy(TM) lens tech and polarization, the Cyrus is sure to create some joyful noise. SPY+'s revolutionary therapeutic Happy(TM) lens tech is scientifically tuned to boost mood and alertness while enhancing color and contrast, providing a truly life-changing visual experience ARC(R) (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(R), a lightweight frame material ideal for everyday wear due to its strength and flexibility Robust 5-barrel hinges for added durability 100% UV protection reduces eye fatigue and long-term sun damage Replacement lenses available Frame measures 58-17-145