After having tried lots of different undershirts from prices > $100 to $7, I have to say that these seem to be the best
shirts for the price. The undershirts are form fitting (I am thin & 6' 1" and a medium is perfect for me). The body of the shirt is long, so it tucks in well. The 5% of elastane means the shirt stretches. A word to the wise, though, if you want this shirt to last wash it in cold, never use bleach, and dry it on low. Also, you are better off not using fabric softeners (either washer or dryer based). If you are someone who has issues with yellowing underarms, don't bleach or use stain removers - just soak the shirt in a mix of vinegar/water or OxiClean/water (bleach will only set the stain).