Showstopper Men King of Diamond Polo. A designer polo featuring one of Showstopper's Elite Collection designs. detailed King of Diamonds design on the back of the shirt with accenting "K" designs on both sleeves. This design is complete with a Fleur-DE-Lis on the front of the shirt. Short Sleeve Polo: 100% cotton 30 single combed ring-spun 4.2 oz., 142 gm/m² super soft baby jersey knit.