UA Base 4 Extreme is our warmest layer, providing extreme heat in extreme frosts. UA Scent Control, captures and suppresses odors, making you less detectable. The soft, brushed grille inside traps air, controls your body's microclimate and keeps you warm and comfortable. The material drains sweat away and dries very quickly. 4-Way Stretch technology allows for better movement in every direction. Elasticated waistband.
