The Tru-Spec Gen III ECWCS Level II Grid Fleece Base Layer Set delivers lightweight insulation and breathability for active duty in chill conditions. The 93/7 polyester/spandex plaited jersey knit with grid-fleece interior texture regulates heat and manages moisture while you move, and flat-lock seam construction minimizes bulk and chafing during layering. Gen III ECWCS Level II 2-piece base layer set 93/7 polyester/spandex plaited jersey knit with grid-fleece interior (6.6 oz.) Top: zip-through collar converts to turtleneck, thumb-holed sleeves, flat-lock seam construction Bottom: elastic waistband with access fly, flat-lock seam construction Microban antimicrobial treatment to resist odor Lightweight grid-fleece knit regulates heat and allows free movement Stretch fabric for mobility and comfort Designed to integrate into ECWCS layering system or wear standalone