The undershirt is okay in so much as it's long enough. But the neck opening is huge. I have about a 19 and a half or 20in collar in a dress shirt, but this neck opening is massive. Almost like it's pre-stretched! And that's one of the reasons I buy a new t-shirt is so the neck fits tighter. That's another reason I buy a crew neck and not a V-neck. Somewhat of a disappointment, and I suppose I'm going to go back to Jockey.