【Photochromic Glasses】 Lenses will change from clear to dark gray in response to the intensity of the ultraviolet, and the visual light transmission of the photochromic lens is from 85% to 15%. Effectively maintain a suitable brightness to protect your eyes in strong sunshine. Attention!!! The darkness of lens color depends on UV intensity! 【UV400 Protection】These MTB glasses are made of high-grade lenses and ultra-light memory TR90 frames. All clear cycling sunglasses have UV400 protection, can block harmful UVA & UVB rays, safe, durable, and impact-resistant, and protect your eyes from sand, heavy wind, and strong sunlight. 【Adjustable Arms】These mountain bike glasses equipped a three-grade adjustment arms, which can be adjusted up and down to fit different face types and wearing needs, bring you a more comfortable experience. 【TR90 Frames&Polycarbonate Lenses】These frames are made from durable TR90 material, which is highly impact and bending-resistant and will not crack or break easily. The polycarbonate lenses are lightweight, impact resistant and has high transparency and can provide clear vision. These sports sunglasses have UV400 protection, which can block harmful UVA & UVB rays and reduce damage to the eyes caused by harmful rays. 【Adjustable Nose Pad】Soft and anti-slip rubber nose pad to avoid mtb glasses dropping down while sweating and fit well on the face.The hydrophilic rubber remains grippy even when wet, so the MTB sunglasses stick to the nose when moving, regardless of rain or fog transpiration, there is no need to worry about sports sunglasses falling during strenuous exercise. 【Multifunctional Occasions】KAPVOE sports glasses are perfect for cycling, baseball, MTB, Triathlon, mountain biking, running, driving, fishing, playing golf, hiking, boating and other activities.