2NDS. Layered over a flannel or thermal, the soft sherpa lining of Carhartt?s sandstone mock neck vest turns into a warmth superhighway that drives heat straight to your core. 12-ounce cotton sandstone duck is micro sanded and garment washed for a comfortable fit and flexible feel. Available Colors: MOSS, CAMEL, DARK BROWN, GRAVEL, COTTONWOOD, ARMY GREEN, CARHARTT BROWN, BLACKENED ORANGE, LIGHT BROWN/BLACK, MOSS/BLACK, BLACK. Sizes: L, XL, 2XL, M, 3XL.