Hot Chillys Pepper Bi-Ply Base Layer is a midweight soft jersey knit with a double layer of back to back MTF micro spun polyester that provides exceptional thermal properties and added moisture management. This fabric’s special two layer knit traps air creating warmth and comfort while the flat seam construction allows for seam strength without abrasion. Limited quantity on the T Necks, T Zip Necks & Kid's Pink.

