After buying 6 pairs of their glasses I bought a replacement pair for ones where the mirror coating wore away after a couple years. 200$ later the new ones came and the coating only lasted 7 months! Wore off when some bug spray got on it. I contacted the company and they told me I could go to an optometrist and have the lenses replaced at my cost. Lame customer service and now totally disappointed with their supposedly indestructible product. Won't recommend to others anymore.