Recipients of a doctoral degree tend to have the most elaborate academic dress, and hence there is the greatest diversity at this level. In the US, doctoral gowns are similar to the gowns worn by master's graduates, with the addition of velvet stripes across the sleeves and running down the front of the gown which may be tinted with the disciplinary color for the degree received. Holders of a doctoral degree may be entitled or obliged to wear "scarlet" (a special gown in scarlet) on high days and special occasions. While some doctoral graduates wear the mortarboard cap traditional to the lower degree levels, most wear a cap or "Tudor bonnet" that resembles a tam o'shanter, from which a colored tassel is suspended.