...for your goggles are totally worth it. I bought a new lens for my Scott goggles, turns out I had Smith goggles so I bought a Scott frame for the lense. At $11 for a lense (with tear-off posts) verses $6, it's not a very hard jump in price to make. I was skeptical, but they actually work quite well. They take about 30 seconds to a minute to go from full light to full dark. The dark is dark enough to cut down on some pretty bad glare. I was able to run some hill climbs that faced directly into the late afternoon sun. The light is almost clear with a slight shade of yellow. They're no fog, too which is really nice.