My husband has been wearing sleeveless undershirts by Hanes for years and really likes them. They are very cool and comfortable in the summer, and if he needs more warmth when the cold weather approaches, he usually wears the half-sleeved undershirts, again by Hanes.
They are made of 100% cotton and wash and dry very well. I have had no problems with taking care of his undershirts. They fit him very comfortably, and Hanes is definitely a brand that we both trust.
When it comes to color choices, the particular shirts we purchase only come in white, but that is the color of choice. And the tagless shirts are the absolute best. No annoying tags to scratch and itch sensitive skin.
When it comes to buying underwear, my husband and I like two brands the best, Fruit of the Loom and Hanes. A pack of five Hanes shirts will cost between $10 and $12 at Walmart, which is a pretty good deal for the long wear that my husband gets out of his undershirts. Hanes is definitely the way to go.