Made with a special two-layer soft jersey knit, this Hot Chillys Bi-Ply thermal is sure to keep you warm when you need it most. The unique double layer construction of this women's crew neck base layer 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. The relaxed fit of this Hot Chillys Bi-Ply thermal makes it a great utilitarian garment.Invest in high-quality winter clothes from Hot Chillys!