You will find that unisex adult clothing like this is never too fussy.
Carhartt K87-M Loose Fit Navy Pocket Logo Crew Neck Short Sleeve T-Shirt XL
A nice touch: the solid design means you can dress it up or down without effort.
Nike Men’s Navy Logo Graphic Crew Neck Short Sleeve Cotton Blend Tee XL SKU 133
You will find that this Nike shirt doesn’t shrink in the dryer.
Aéropostale Men’s M Navy Logo Short Sleeve Crew Neck Cotton Blend Knit T-Shirt
A nice touch is the solid color, which makes this shirt a true classic.
The British Blew A 13 Colony Lead | 4th Of July Men’s T-Shirt
A nice detail in the 2XL is the locker loop on the back of the collar.