What I notice is the crew neck, which is cut to avoid any choking sensation.
Men’s Gray Solid Jersey T-Shirt, Crew Neck Short Sleeve, Size S Regular Fit
You will see that it’s unbranded, leaving room for your own accessories.
Gildan (5-pack) Bulk Solid Heavy Cotton Short Sleeve Blank Men T-Shirt S-3XL
You will find that the crew neck finishes the shirt with a neat, rounded edge.
When God made me 60 years ago 60. Birthday Gift Unisex T-Shirt
A nice touch is the unbranded fabric, which is smooth against the skin.
All Day Social Club
With a solid hue, this shirt becomes a quiet foundation for louder accessories.