Here's one of our most versatile new performance thermal tops. The 100% polyester fabric features anti-odor and Work-DryŽ moisture management properties, the tapered cuffs keep warm air locked in, and the seams are all flat-lock stitched for added durability, comfort and strength. The mock neck style provides added warmth and can also be unzipped to cool down. Like all Carhartt products, this top is designed to last and job-tested for ruggedness.For over 115 years, Carhartt has manufactured premium workwear known for exceptional durability, comfort, quality of construction, and fit that you can feel in the fabrics and see in the performance.