This combination of a white and black crew-neck t-shirt and red chinos is indisputable proof that a safe off-duty outfit can still be incredibly stylish. Look at how great this outfit is finished off with a pair of plimsolls. So if it's a super hot summer afternoon and you want to look dapper without exerting much effort, this ensemble will do the job in no time. This combo illustrates that in your thirties your dressing options are pretty much limitless.