Spring Waltz Handkerchief Dress Button Up vs. Button Down Shirts: The Key Differences Explained JetPrint Business casual isnt polo and khakis. Its a step down from a suit and tie; not a fall from grace., The modern version looks like this: a refined jacket, elevated knitwear like this mock neck from Undershirt Styling Guide for Perfect Formal and Business Attire Ryan Dazzling V Neck Tiered Metallic Satin Mini Homecoming Dresses, Red Slim Fit Black Dress Waistcoat