Okay Deborah, I would never recommend working out in your underwear if your doing the slow and heavy series, there's just no need for that. NOW....if your doing IMAX I, II, CK or maybe even bootcamp underwear alone may be exceptable as one tends to get fairly hot. I personally prefer wearing underwear for all of Cathe's tapes as I am a fairly conservative person and I'm sure she would agree that this is a politically and hygenically correct position I'm taking although I'm sure this could be debated.
Briee
Just for the record.....I prefer grey. Jumpiman on the other hand prefers green.