I would strongly recommend Whites new undergarments, Thermal Fusion. The fact that you just bought a Fusion suit would suggest that you considered the option of Whites undergarments also?
I just purchased them and have nothing bad to say. Thermal Fusion is like the mobility of a ninja, the warmth of your first kiss and the comfort of a lover on your birthday. Of course anything that good must have a significant price tag, however, it does have exactly that a significant price tag. It is around $500 CAD. Since you just made the investment in a good suit though, that suit deserves good undergarments.