PHOTOCHROMIC TECHNOLOGY: The photochromic lens is based on the intensity of sunlight. The lens will darken in the sun and briefly lighten indoors. You don't need to change the lens for different lighting conditions.

LIGHTWEIGHT & COMFORTABLE: The photochromic sunglasses weigh only 30 g; you won't feel a thing on your nose. Ultra-lightweight cycling sunglasses reduce pressure on the nose and temples.

SAFETY: Thickened PC lenses with UV400 protective coating, shatterproof and scratch-resistant, offering greater flexibility and impact resistance, and protecting your eyes from dirt, UV rays, and other harmful light.

MULTI-PURPOSE: ROCKBROS photochromic sunglasses can be used for various activities such as golf, cycling, driving, fishing, skiing, running, racing, and other outdoor sports.

100% SATISFACTION: ROCKBROS is committed to ensuring customer satisfaction with our photochromic sunglasses. If for any reason you are not satisfied with these glasses, you can return them within 60 days.