measurements: 57 [ ] 17 / 130 material: aluminum / acetate lens: base 6 lens colors: ASH ( Grey A ) A lighter shade of Smoke. Ash transmits colors evenly and allows for true color recognition. Good for a variety of activities on partly sunny to very sunny days. 35% LT 35% BLT PFE: HIGH  Bright sunny conditions     Partly sunny or varying conditions     Overcast or low light conditions    Biking  Skiing  Motorcycling  Reading  Fishing  Golfing  Tennis  Gardening  Hiking  Shooting  PFE - POLARIZED FILTER EFFICIENCY    LT - LIGHT TRANSMISSION    BLT - BLUE LIGHT TRANSMISSION