Oakley39s new clear black iridium photochromic lens boasts an impressive 23 69 percent transmission range making it ideal for varying lighting conditionsif you always train and compete in the same place at the same time of day and in the same weather one pair of lenses is enough the real world demands more flexibility so when we invented flak jacket we created an interchangeable lens design that lets you adapt for the best performance possible right here right now multiple options are av