Functional Sleeve Buttons: These are actually called surgeon cuffs. The functioning buttons allowed the doctor to unbutton the sleeve, roll up his sleeves, and perform surgery. Today that detail is often overlooked by suit makers. The main reasons being it is costly, time consuming, and the sleeves must be at the proper length (sleeve alterations are difficult to perform once buttonholes are cut). The surgeon cuff is a subtle nod to the past as well as another way to help you stand out from the masses.