This piece uses a crew neck that feels sturdy but still flexible on the neck.
Amazon Essentials Men 6 Pack Crewneck Undershirts White Blank Medium 100% Cotton
A crew neck like this one sits comfortably under sweaters or cardigans.
White 3 Pack Men’s 100% Cotton Crew Tagless T-Shirt Undershirt: 2XL-3XL
You will find the crew neck is snug but not restrictive, ideal for all-day wear.
Jockey Men’s 100% Cotton Classic V-Neck Undershirt – 6 Pack
This white t-shirt is simple but never boring, thanks to that clean color.
12 Pack BYC Men’s 100% Cotton White Undershirts Tank Top A Shirts MT01
A nice touch is the soft white color that doesn’t scream for attention but looks elegant.