I began commuting early this summer for the first time, initially some co-workers and one supervisor made some caustic comments about me wearing spandex into the office (I immediately change as soon as I arrive into work-acceptable clothing). I purchased some baggy shorts & looser fitting jerseys and after 3 months, the novelty has worn off and no one pays any attention any longer.

These days there are numerous non-spandex options for commuting. My brand preference is Endurasport out of Scotland, use these shorts;
Endura - Products

and these jerseys, and haven't gotten any flak at work.
Endura - Products