From a professional's point of view, it's a one-shot no-no attire that you often see at work in the summer

Roughly speaking Executive stylist Taeko Nagatomo explains Cool Biz clothing etiquette. Mr. Nagatomo says that if the sleeve width of a short-sleeved shirt or too much of your innerwear is visible, you'll be out of luck. Nagatomo recommends aiming for an "effortless" style rather than a "loose" style. Read article