You will find that the solid design here keeps things simple and never goes out of style.
Brooklyn Vertical Mens 6-Pack V Neck Undershirts Short Sleeve Cotton Round Neck
The short sleeve design is straightforward, but it really delivers on comfort.
3-12-Pack V/Crew-Neck For Men’s 100% Cotton Tagless T-Shirt Undershirt Tee White
What I like is how it fits men of average build without being baggy.
NE PEOPLE Mens Comfy Ribbed Knit A-Shirts Undershirts Tank Tops S-5XL [NEMT105]
What I like is the way it hangs on men, no weird bunching around the waist.
Hanes Men’s tagless V-Necks T-Shirts White 6 Pack Size S (34-36″)
A nice touch: the solid hue here is deep without being too dark.