I generally wear undershirts at all times. Is that still acceptable? Also, what is the best undershirt (tee, not tank)?

Mike,

Without a doubt, it's completely ok to wear an undershirt.

There's no hard fast rule as to what style of undershirt to wear, but if you don't mind them showing, a nice clean, crisp, and well maintained crew neck undershirt will always look great.

If you prefer them not to show, go with a lower cut crew or opt for his cousin, the v-neck undershirt.

There are so many different undershirts available, it's hard to say exactly what would be the best undershirt for your particular body size, shape and style. Either visit your local Macys or check out the available options at freshpair.com or barenecessities.com.

If you have any specific questions, feel free to drop me a line directly.

Best,
Tug
http://www.undershirtguy.com

Absolutely OK to wear an undershirt - in fact, I think it's compulsory when wearing a button-up shirt. You might get away without one with a polo-style shirt. I also second/third/fourth that Hanes Perfect Tees are the best, irrespective of price.

Undershirts can always be worn...As long as they aren't worn out. There's nothing worse than a greasy, sweat-stained, stretched out, neck line on an undershirt. It happens all the time to the best of undershirts, so know when to throw. If your not going to be able to allow yourself to toss that Ralph Lauren undershirt your thinking about buying, then don't spend the extra money and go for something cheaper. All undershirts wear out. It may take 3 months or 3 years, depending on how much you sweat, how much you wear them, etc. Oh, and always check for pit stains, too. You never know when that over-shirt might need to come off-like when Toby from HR tells you that your "Assk me about my butt" shirt is inappropriate for casual Friday. If there are any noticeable signs of wear, go ahead and toss it in the Trash

I pretty much only wear undershirts beneath my dress shirts Monday - Thursday. When wearing polos or casual shirts, I ditch the undershirt. The best undershirt I have found so far are from Brooks Brothers

Undershirts are always fine, as long as you don't have one on that comes up too high on the neck, dirty, or some weird pattern or color that doesn't match. One thing I am seeing more of is instead of a tee a shallow v-neck which I personally feel looks pretty sharp. Banana Republic makes a good one, http://bananarepublic.gap.com/browse/product.do?cid=&vid=&pid=637911&scid=637911002

Undershirts are always appropriate, and I would be hesitant to be in any business situation not wearing one for fear of showing an underarm watering hole. When wearing a button down, a polo, or any other nice dress shirts, I see an undershirt as mandatory. I have always made employees of mine wear them, as a nice complimentary colored undershirt with a good collar is much more pleasing then a guy showing his chest carpet to the world. For white tees, Hanes does make one of the best with varying specs like length, width, and even types of collars. For better undershirts, and more options when it comes to colors, JDParker is absolutely correct, Banana Republic is outstanding. They can be pricey, but with good care will last a very long time!

They may be a bit more pricey than some other brands, but American Apparel is what I usually wear for an undershirt. I live in South Texas and unless you enjoy having a moist shirt showing then it's a necessity. A 3-pack of black and/or heather grey and that should cover just about any wardrobe situation.

I may sound a bit old fashioned but an undershirt is called an undershirt for a reason and shouldn't be worn alone. Although some people believe it is okay for it to be seen, I disagree, I also disagree with showing the waistband of your underwear - it's sort of the same thing.

When wearing an open collared shirt I wear a v-neck undershirt. Crew-neck undershirts are for crew-neck shirts or when layering when you want a casual look, but I would recommend a solid color or printed tee instead. I wear a crew-neck undershirt instead of a v-neck when wearing a tie so the lines of the undershirt do not show.

I like 2x-ist undershirts because of the slim fit and the quality of the fabric. Hanes are good quality shirts but a little thicker/heavier than 2x-ist.

http://www.2xist.com/collection.asp

I wear undershirts and I like 2(x)ist as well, however if you want the best undershirts and money is not a problem, or if you're like me and money can be a problem but you want at least one of the best undershirts for special occasions, go with Hanro. They are unbelievably comfortable, cool and downright luxurious.

http://www.hanro.com/