I bought some Adidas glasses with interchangable lenses and prescription inserts. The water stays on the outside so I wipe them off with a finger occasionally. They have air flow slots in the side to keep them from fogging up most of the time. That plus a helmet visor for hard rain works pretty well for me, but I may try rainex on them this winter.
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10 consecutive years of RUSA R12
PBP Ancien 2011 2015 2019