The FeelU Micro modal shirt is also a great option. This shirt focuses on underarm sweating and also torso sweating. Since having my ETS surgery, compensatory sweating on my torso has been a problem. Modal fabric is one of the BEST fabrics you can buy when it comes to sweating. Modal could contain about 50% more hygroscopic per unit volume than cotton. It has good moisture regain and air permissibility. Therefore, modal underwear could absorb more sweat and keep the body dry and feeling cool.

Description:
These ultra comfortable sweat proof undershirts with reinforced underarms combine fit, feel and function to keep you dry, cool, comfortable and confident.

Sweat Solution- The micro-modal fabric with 50% more moisture absorbed than pure cotton features fast dry and keeps you cool and comfortable all day.
Functional Underarm Patch-The double layer underarm patch can absorb extra sweat.
Modal- The fiber remains wonderfully soft even after repeated washing and retains its color brilliance.
Snug Fit and Stay Tucked- Extra body length to stay tucked at lower body, no bunch up and ride up; slim look
Crew Neck- Its crew neck gives you a stylish look
Free Moving- The all-direction stretchable fabric moves with you to be next to the skin.
Everyday Use- It goes with your suit, tie and casual wear, or acts as your evening wear.

Material:
96% micro modal, 4% spandex

UPDATE (5/25/16)

I found out that from the FEELU guys that they are no longer selling these t-shirts. Luckily, thee is a similiar product made by David Archy. I will keep this up just in case the FEELU shirt returns.