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Smith Factor Interchangeable Sunglasses - Polarchromic - 2006
Go for a run, ride, or ski with the Smith Factor Photochromic Polarized Interchangeable Sunglasses. They'll go the distance during any outdoor activity—if you can. The polarized lenses fight glare so you don't have to squint when the sun hits the pavement, water, or snow. Photochromic lenses change with varying light conditions, so when it gets light, these get dark, and when it gets dark, these lighten up. If a storm rolls in and you still need eye protection, choose one of the four lenses that come with the Factor Sunglasses to suit your needs. Hydrophilic Megol nose pads keep these puppies in place, no matter how sweaty you get. *See sizing chart for lens information.
Bottom Line: Plan a day full of activities with the Smith Factor Photochromic Polarized Interchangeable Sunglasses.
These smith factor sunglasses are light and don't slip. I use them for mountain biking, skiing and mountaineering. The photochromatic lense is handy as you might think. When it's super bright you aren't squinting but when the clouds roll in and you're biking through the trees you can still see.
Wikipedia says exactly what I would tell you, but in a more concise manner."The colour of the lens can vary by style, fashion, and purpose, but for general use, green, grey, yellow, or brown is recommended to avoid or minimize color distortion which would be dangerous when, for instance, driving a car. Gray lenses are considered neutral because they do not enhance contrast or distort colors. Brown and green lenses cause some minimal color distortion, but have contrast-enhancing properties…[Continues at Wikipedia]http://en.wikipedia.org/wiki/Sunglasses#Lens
I really like these sunglasses. I use them when I go for a road ride and when I run. They are extremely lightweight! The nose pads stick to your face like crazy, even when you're sweating. The photochromic thing is cool too. Although you can't really tell when it's happening, they do get darker or lighter, depending on the light conditions. I highly suggest them to any althete...or anyone for that matter!
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