Some of the most common trends are in collar, a button front or cuffed sleeves. The materials frequently made up in crisp fabrics like cotton.Classic Long-Sleeved Dress ShirtYou really can’t go wrong with this, as long as you find the right matching color and pattern. Try to find something that doesn’t have any pockets, if you can, for smart casual. White is most preferred color as it is easily match with whatever pants, but almost any color will work. However, the latest trend is black or other uncommon dark color, which is very popular in man fashion world, which was against those days where black is always related to mafia or gangsters. You can mostly find this type in the business attire or smart casual wear.Short-Sleeved Dress ShirtI realize it might be hot in the office, but this rarely looks good on a man. Makes me think high school science teacher the moment I see it. I might even ask where your pocket protector is! So those are the basics. There are other shirt styles out there that may look good on you, but these are pretty much safe for anyone. My advice is to avoid anything flashy or trendy – they tend to get you noticed for the wrong reasons. And by the way, you don’t have to buy Polo brand – Land’s End, L.L Bean, Hanes and many other companies make quality shirts. Just get something made of quality material and you’ll be fine.Long-Sleeved Polo ShirtThe most classic and mannish. Just make sure you leave at least the top button undone, ha ha, otherwise this will look like a geek. It is well received with solid colors and jeans or khakis. Tip: For jean, it is preferable to leave it un-tucked if this is not too long, but if wearing khakis, tuck it in.Short-Sleeved Polo ShirtAgain, classic and mannish, these come in a variety of fabrics and designs. These short-sleeved polo shirts are mostly suitable with jeans or khakis. Color strip or solid colors are both well received in man fashion world. Recently, it is also very popular in man and women sports world like golf.The TurtleneckA round close-fitting neckline that comes up higher than a crew neck but not so high as a polo neck. This was initially design to suit winter weather in Western world, and it turned out to be fashionable style in male and female fashion world. Don’t you dare laugh, this looks is really great. They come in a variety of fabrics, something nice and thick tends to suit every man.Classic Crew Neck T-ShirtThis is most well received by all age group. College t-shirts are fine, as long as they meet the other guidelines. Some prefer with pocket and others no, but I think they look better without. Most common colors are white and black, red is hot and yellow is fun. A nicely match t-shirt makes any man look twice as good! T-Shirts also gives men the choice of creating a ‘personal brand’. This means they can personalize the T-Shirt to their taste, political affiliations or personal thought, and this is getting common in teenage fashion world, and also well received by man in IT world, such as Steven Jobs of Apple, Larry Page and Sergey Brin of Google.Tip: Make sure it fits your body, these don’t look good baggy.Classic Wife-BeaterAlso known as A-shirts, they are usually worn by men, They are generally made for use as underwear, and generally have large sleeve holes and a large neck, down to near the chest. The term originates from frequent depictions in popular culture of aggressive American men, usually living in poor conditions and having low income, beating their wives and/or children while clad in this shirt.Tip: Looks good on well-built fellas, pathetic on skinny fellas, and disgusting on fat beer bellied fellas.