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 got 3 of the spinair 58 purple, blue and red. I bought the glasses because of the adjustable nose piece. Now I'm buying the Demi brown.
My Propusle RX prescription glasses with ImpactX Photochromic 2 Red are my all-time favourites. For everything from XCO racing to Gravel night rides these lenses perform under a wide range of conditions. I love them so much I'm planning to buy a 2nd pair.
Great helmet - combo of perfect fit, light weight - really nice for training. Easy to adjust / fits according to sizing.
Nice plus - great helmet for racing triathlon in really hot conditions - very breathable for racing yet aero.
Would / did recommend to many friends who also like it as well.