I've had my Rydon Shooters kit with Rx Insert for over 5 years. (They're great!) I need some replacement lenses that are Z87.1 rated. Doing a search returns "COLOR IMPACTX-2 PHOTOCHROMIC CLEAR TO BLACK Z87.1 SAFETY" as the only lenses listed as Z87.1 rated. Do they have Z87.1 marked on the lens? This is required by MSHA and OSHA.

The photochromic clear to laser brown works well at changing quickly, but doesn't get nearly as dark as advertised. Mine get to maybe 40-50% transmission. I learned it's UV that causes the darkening. I live in Salt Lake city, Utah area, and according to AccuWeather the UV index on the day I tested them (which was cloudless) was 'very high'. Maybe altitude or humidity makes a difference. Also note vehicle windshields can block UV, so the glasses might not darken much.

Got 3 sets of Rydon lenses..and it is the best..very durable and easy to change. Im planning to get the Rydon Stealth..wondering though if my extra lenses can fit the Stealth.