You open your closet on the first day of a new job. There is no dress code memo, just an email that said business casual You own suits. You own T-shirts. Nothing in between feels right. That gap between a suit and a T-shirt is exactly what business casual attire for men is meant to fill. It is one of the most common dress codes in offices today and also “Business Casual Attire for Men: Smart Casual Looks with a Touch of Class”