A white and blue short sleeve shirt and jeans will add extra cool to your daily off-duty collection. With shoes, go for something on the classier end of the spectrum by finishing off with navy leather tassel loafers. You know when it's blazing hot outside, sometimes only a summery outfit like this one can get you through the day. As a 30-year-old man, you probably want to start dressing like an adult. If that's the case, inspiration like this proves very useful.