A nice detail is the regular cut, which allows for easy layering under a jacket.
Method Blue T-Shirt Men’s M Crew Neck Short Sleeve Poly Cotton Blend
What stands out about the sleeve length is how it flatters most arm shapes.
Tool Schism 2006 Vintage Blue Label Anvil Tear Away Mens Medium Band Tee Shirt
A nice touch is the short sleeve cut, which allows for a full range of motion.
Vintage 99.5 WYCD Detroit Ram Party Pit Graphic T Shirt Red Gildan Size L
The Gildan Heavy Cotton tee has a generous cut that still looks tidy.
Vintage Colorado Rockies T Shirt Mens M Purple Colorado Territory MLB Y2K
What I notice is the crew neck, which has a slight stretch for easy movement.