Made with a special two-layer soft jersey knit, this mens thermal top is sure to keep you warm when you need it most. The unique double layer construction of this mens underlayer traps warm air between the two layers for excellent thermal retention, while the special MTF soft spun polyester fibers provide additional moisture management to wick away moisture, keeping you dry. Pepper Bi-Plys relaxed fit makes this mens thermal top a great utilitarian garment.