Consider wearing a long sleeve shirt and white cargo pants to prove you've got serious sartorial prowess. Up your ensemble by rounding off with a pair of dark brown suede loafers.
White Cargo Pants with Long Sleeve Shirt Smart Casual Outfits
This pairing of a long sleeve shirt and white cargo pants is on the casual side but guarantees that you look sharp and seriously sharp. You could take a more elegant route with shoes by rocking brown suede brogues.