I bought 2, thinking they wouldn’t do much more than the ones I’d already bought...I was wrong!! Excellent comfort & even better support. So much support that my upper back was sore from having my back in the proper position.
I can a little different with the shirt on but the sizing makes the fix uncomfortable, the arm are very tight. The sizing chart recommended large is to small for me (5'9"/185lbs). After the first the wash the collar is not as snug.
Other than the fact I had a tight shirt on underneath to remind me to improve my posture, this shirt did absolutely nothing mechanically to improve my posture. I will be returning the majority of my ofrder