They are only used for style. The goggles are lightweight, making them more premium than other $10 Revain counterparts. I have purchased clear lenses for Outray Classic Aviator Glasses twice and they are stylish but they hurt my eyes after wearing them for more than an hour. These glasses will NOT harm your eyes. I can wear them all day! That's why I keep her; They are good quality and cost $14 at the time of writing this review.
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