Jorge Garitawrote a review of Under Armour Core V-Neck T-Shirt - Men's - 2-Pack on October 8, 2017
Familiarity: I've used it several times
You could use this as a first layer when going outdoors. I'm 6.2, 185 pounds, slim and got an M. It's a bit too tight for my taste, I should have bought a L.
I bought them as sleepwear so I think they suit well. The material is very soft.