Database
 
 
Gascan Replacement Lenses
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Color:  Ruby, Gold, Bronze
Easy to pop in and pop out for quick customization, or changing light conditions.  It's not switch-lock fast and easy, but non too difficult.  The prices aren't so much that you'll break the bank on replacements or for customizing.  I switched out the grey for gold on my Burnquist's and it looks great with the 'woody' O icon.
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Its very easy to change the lenses. Also, by combining a new rep. lens you can get an entirely new look on your sunglasses. I highly recommend these lenses. :-) 
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GC replacement lenses are where it's at right now.  Many more colors available than listed - such as Ice, G30 Titanium, HI Yellow and Ti Clear.  Whether your making your own custom GC, or taking advantage of the large GC lenses to custom cut a lens for another eyewear, these are fantastic!