For my trip around Lake Superior, I brought three pairs of loose-fitting cycling knickers, three woolen jerseys (2 short sleeve, 1 long), three pairs of regular socks, one pair of knee socks, arm warmers, rain jacket and pants, a cycling cap, and a knit cap. I went commando so I didn't have to bother with undergarments.

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And holy crap, Machka, this thread is old... ;-)