The Under Armour Extreme Base Baselayer Bottom keeps you warm and dry in extremely cold conditions. The moisture-wicking 100% polyester shell is lined with high-pile fleece for superior next-to-skin comfort. Exclusive UA Scent Control technology is paired with an ArmourBlock anti-odor treatment to trap, suppress, and inhibit the growth of odor-causing bacteria, keeping you undetected longer in the field. Strategic stretch panels offer an improved fit, while the off-axis set waistband adds extra coverage where you need it. Fitted design. Imported.