Tommy John Men's Sleekheat Long Crew Neck Top 57% Polyester, 37% Viscose, 6% Spandex Imported Machine Wash Memory Collar - prevents bacon neck Temperature Control - smart fabric that keeps you warm outdoors without overheating in doors Stay Dry - modern, smart stretch fabrics prevent moisture build-up Streamlined Fit - hugs the body but never restrictive Stays Tucked - patented design never comes untucked