A crew neck design like this one works great for layering under jackets or hoodies.
BELLY Film Black Heavy Cotton T-shirt S-5XL
You are getting a quality unbranded T-shirt here, perfect for layering under jackets.
Men’s Heavy Cotton T-Shirt Short Sleeves Crew Neck Plain Blank Tee Pack of 5
You will find that this black shirt matches with jeans, chinos, or shorts easily.
150 Years of Major League Baseball | Gildan Men’s T-Shirt
The black shade is deep enough to look premium without being flashy.
Nike Sportswear JDI Men’s T-Shirt Green Mens Size XL AR5006-341
A nice touch is the solid finish, which resists looking dated over time.