ROCKBROS Mountain Bike Glasses for Men Cycling Glasses with Interchangeable Polarized + Photochromic Lenses Sport Sunglasses PRODUCT DETAILS BRAND: ROCKBROS NAME: Cycling sunglasses WEIGHT: A pair of glasses is only 30g FEATURES: Two interchangeable lens LENS: one Polarized lens+ one photochromic lens KEY FEATURES 1.A pair of glasses with two lenses, one is polarized lens, the other is photochromic lens. 2.UV400 protection polarized sunglasses effectively block UV rays, restore true color and protect eyes. 3.Photochromic sunglasses change color depending on the intensity of the UV rays, the stronger the UV rays, the darken the lens. 4.The lower part of the biking glasses frame is removable to unlock stylish matching. 5.The hole design on the lens prevents the glasses from fogging up while doing sports. 6.Adjustable and anti-slip nose pad fits for most, we also provide a myopia lens frame for myopic people. 7.30g, ultra light frames are made entirely of lightweight, rugged TR/PC, you won't feel discomfort even after wearing them for a long time. 8.This sports sunglasses are perfect for cycling, driving, hiking, fishing, running, racing, golf, climbing, trekking or other outdoor activities.