ImpactX® lenses are photochromic. This means they get dark from low to high light transmission within few seconds and reaching a custom color from an initial clear state. They enhance contrast, improve visual acuity and depth perception. ImpactX® lenses are 16% lighter than CR-39 and 10% lighter than polycarbonate; they have lower internal stress and chromatic dispersion than polycarbonate, resulting in sharper images, higher definition, reduces “rainbowing”, and more visual comfort.
I opted for the slim black gloss with ImpactX Photochromic 2 Black lenses to use for trail and road running. I've tried a few other brands with transition lenses, but found them to adjust very little unlike these which quickly go from clear to dark based on the lighting conditions. The slim is a perfect fit and still provides full coverage. I've also found them to be very fog resistant even though they have less vents than the Propulse. These weren't inexpensive, but you get what you pay for and these are top notch! Highly recommend!
I have been trying out multiple glasses from Rudy and so far my favorite are the traylx.
They fit perfect, no fogging up and very durable. I have multiple different lenses which all work great and stored in a handy case provided by Rudy. I highly recommend the Rudy lineup.
I love my Boost 01 helmet, and these pads keep it going! Great quality too, just as I'd expect of Rudy Project.
These frames do exactly what I need them to do. They carry my Rx lenses so that I can see, adjust filtering / clarity in changing conditions (I have the ImpactX Photochromic 2 Laser Red Lenses) and all without me constantly adjusting them. Often I don't even think about them during a long run until I take them off and realize it is really bright outside! It was an excellent purchase and one that I would make again.
About a year ago I got a Rydon frame and put Rx lenses into the frame. I use these for skiing, hiking, running, walking, ... The frames work great, are very comfortable over the long run and have easily handled the abuse I try not to give them. I am very happy with these glasses!