【3 LENSES FOR DIFFERENT LIGHT】 The main lens is for daytime, the black TAC lens is polarized for reflections, and the clear lens covers overcast, dusk, low light and night riding. Only the black lens is polarized. 【3-POSITION FIT & VENTILATION】 The nose pad adjusts through three positions and lens vents promote airflow, helping maintain comfort and stability through movement. 【UV400 & Wide Wraparound View】 All three lenses provide UV400 protection with 99.99% UVA/UVB filtering. The sporty wraparound shape offers a wide field of view with added coverage from wind and dust. 【Lightweight TR90 & Stable Fit】 The light, flexible TR90 frame and anti-slip contact points around the temples and nose support comfortable stability through longer rides, sweat and uneven terrain. 【For Cycling, MTB, Running & Hiking】 Three lens options make K76 versatile for cycling, MTB, running and hiking across bright sun, changing weather and lower-light conditions.