- Men's bluey green suit waistcoat - V-neck, sleeveless - 2 piped side pockets, satin twill back - Tab to adjust on back, buttons to fasten - IKKS #actforbetter: fabric contains textiles (polyester, viscose and elastane) from Recycled Claim Standard (RCS) recycled raw material The 3rd piece in a suit is the little waistcoat. As it goes with the jacket and trousers it can be worn with one or the other or both.