Rothco's Mock Turtle Neck Dickie Is Perfect For Law Enforcement, Public Safety & Other First Responders To Be Worn Under Their Uniform Shirts. With The Body Made of 100% Cotton & The Collar Made of 95% Cotton / 5% Spandex, This Turtle Neck Dickie Is The Perfect Addition For Cold Weather Environments. The Front & Back Measure 15" For A Deep Fit Under Other Clothes.