Funny stuff in this thread. For anything other than training rides I wear whatever normal street clothes I happen to have on. Most of the time that's Levi's 511 or 513 (stretchy fabric both) but might also be khaki's, gray flannels, or a suit. Just about the entire population of The Netherlands and big chunks of Denmark, Sweden, and Germany and millions of others throughout Europe and Asia do the same with no ill effects. Why do Americans like to complicate things so?