Heat Holders® Women's ORIGINAL™ Base Layer Tops are a heavy weight thermal base layer ideal for extreme cold. DUAL BRUSHING: Supersoft HeatWeaver® yarn is carefully brushed both inside and out to maximize warmth and softness. PERFECT STRETCH: Heat Holders' knitting technology and attention to detail produce the perfect stretch for freedom of movement and fit. FLAT COMFORT SEAMS: Carefully finished flat seams minimize bulk to create a comfortable non-chafe fit, perfect for layering. MOISTURE & ODOR MANAGEMENT: Moisture and odor management technology helps keep you drier, fresher and more comfortable. Heat Holders Women's Maria Original Base Layer Top - Black