The most important thing about rain gear is warmth. Forget about trying to stay dry, because that is impossible in some of the conditions I have ridden in. Just wear enough to ensure that the temperature while you're riding is bearable. For commuting, carry a dry change of clothes wrapped in a solid plastic bag inside your pannier.
Once this art has been mastered, riding in the rain is actually better than riding in the non-rain. :thumbup:
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I am clinically insane. I am proud of it.
That is all.