the 509's for me fog easly and i think i messed up the lens changing them from amber/chrome to clear...i had to take them off yesterday and go back to my dragon dx's because i couldnt get them to stop fogging and couldnt get the ice off the len's...my helmet is a kbc moto helmet my dragons fit awsome in it not so much for the 509's and there is also a little black part on the top of the 509 frames that comes off very easly almost lost it yesterday dunno what it does its preassure fitted into the top arch of the frames...for 60 bucks i could have another set of dragons and 2 new len's which im about to order any ways...ive heard yellow works best in flat light but i think there really isnt much you can do about it...but as for the 509's not very impressed so far mabey they work better in warmer weather
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