... Hi-Vex Lens Just like Tri-Vex, light-weight, impact resistance, clarity, UV protection Light-weightWith a Gravity of 1.25, compared with ... -Vex is an optimal choice for wearers who want to enjoy a light wearing experience a whole day.Impact ResistanceHi-Vex has passed the ... is 10 times more than that of a standard CR-39 lens, so as to protect eyes away from injuries.Clarity With ...