This is probably the most classic combination. But let's start with what good shorts should be like. First of all, summer shorts should be made of lightweight materials - such as linen or canvas, from which chinos are made. Also, remember that the shorts you wear should not be too long or too short - they should end just above the knee. This way, you won't shorten your silhouette.
Pairing a polo shirt with shorts is a good solution for a relaxed, yet still chic outfit on a weekend or a so-called casual Friday on a really hot day. With this outfit, you can also choose espadrilles or moccasins, which you should wear barefoot or with socks hiding under the line of the shoes.
You can safely pair a shirt with rolled up sleeves with shorts that end above the knee. With short pants made of denim or jersey knit fabric, wear a loose plaid shirt and leave it untucked. If you prefer the preppy style, wear a button-up shirt made of linen or cotton with chino-style shorts, tuck in the shirt, and finish the outfit with a leather belt in beige or brown.
This may not be a very orthodox combination, but it works for every man who likes to play with style and fashion. Remember not to go for a blazer without padding in the shoulders in such a set. It should be a casual one, buttoned with one or two buttons. Just like with pants, it's better to choose a blazer made of linen, jersey or cotton. When it comes to shorts - go for the chinos cut. Also, a good solution would be to choose pants with cuffs.