You will find that a solid T-shirt like this one is a staple for any closet.
Men’s Sport Warmer Long Sleeve Performance Moisture Wicking T-Shirt Gym Tight US
You will find that the black dye holds up well against sun exposure.
Men’s Winte Warmer Long Sleeve Moisture Wicking T-Shirt Gym Tight Shirt Liner US
A nice touch is the black piping along the collar.
Mens Running Soft Long Sleeve Johns Liner Moisture Wicking T-Shirt Gym Tight Top
The black color hides wrinkles well, so you can skip ironing.