Designed for active lifestyles, the Revo Guide II Polarized Sunglasses deliver crystal-clear optics and streamlined performance when you're stalking trout on your favorite stream or hiking through the scorching desert. The Serilium lens offers a lightweight feel, optical clarity, and high-contrast polarization that cuts blinding glare coming off water, snow, and ice. Its Eco-Use nylon frame is sourced from castor bean oil, delivering a more sustainable pair of sunglasses that are highly durable against small bumps and drops. In addition, this frame is engineered with Motion-fit tech, ensuring theses sunglasses stay put when you're moving rapidly and exercising. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.