A nice touch is the slightly longer length, so it stays tucked in nicely.
Polo Ralph Lauren Mens Pocket T shirt Classic Fit Short Sleeve Solid Colors Tee
This T-shirt’s solid design is like a blank slate for your personal style.
Plain Solid Crew Neck Tee Shirt, Comfort Daily Outdoor Casual Men Wear
This black color is a smart choice for anyone who loves simplicity.
Men’s Solid Color Sleeveless Tank Top with Pocket for Everyday Style
I like that this is an unbranded shirt, so it doesn’t compete with your accessories.
TravisMathew Top Places Solid T-Shirt – Men’s
You will find that unisex adult clothing like this is great for layering under jackets.