ROCKBROS Photochromic Sports Sunglasses for Men and Women with UV400 Protection. Includes Myopia Frame. Suitable for Running, Cycling, and Fishing. KEY FEATURES: 1. Photochromic Technology: Intelligent lens automatically lightens or darkens in response to changing light conditions. 2. Frameless construction for clear peripheral vision. 3. Ultralight design reduces pressure on nose and temples. 4. Thicken PC lenses with UV400 protection coating, shatterproof and scratch-resistant. 5. Adjustable soft rubber nose bridge for a secure fit. 6. Suitable for multiple activities: golf, cycling, driving, fishing, skiing, running, tennis, racing, and other outdoor sports. TAC LENSES: 100% UV400 protection coating, high-quality photochromic anti-scratch TAC lenses that block UVA, UVB, UVC, and other harmful light effectively.