Nautica Vest Set, Navy, 18 Months Shirt: 55% Cotton/45% Polyester; Tie: 100% Polyester; Pants: 100% Polyester; Vest: Shell Front: 71% Polyester/29% Rayon, Shell Back: 100% Polyester, Lining: 100% Polyester Pant, Vest And Tie Are 100% Polyester. Shirt Is 58% Cotton/42% Polyester