You really should try the OS superstretch series. It has 4 way stretch. You can purchase the single layer jumpsuit and add the pants and vest for layering. They also have it in a double layer jumpsuit.
I have the jumpsuit, pants, and vest. They fit like a glove. Absolutely NO restriction whatsoever. Really excellent stuff. They are NOT bulky, and fit your bodies every contour.
They also ship very fast.
You will feel like Bruce Lee in your new undies. So comfy you will wanna wear em around the house.
I ordered my pants, vest and socks direct from OS. The jumpsuit you can order from online elsewhere... as they don't sell the jumpsuits direct from OS to consumers.
Scubacenter.com has the jumpsuits, but you may find your LDS can get the jumpsuit for the same price or less, and have it delivered in 2 days.