UA Base 4.0 is built for extreme cold weather and lower activity. It uses a unique pattern that's designed to trap heat without adding bulk. Think
Women's UA Base 4.0 Crew
UNDER ARMOUR Women's Base 4.0 Leggings
Under Armour Coldgear Compression Leggings
Under Armour Women's ColdGear® Base 4.0 Leggings - Hibbett
Hot Chillys Peach Skins Roll T-Neck - Men's
Under Armour Coldgear Compression Leggings
Under Armour Coldgear Compression Leggings
Under Armour Base 4.0 Extreme Base Layer Leggings for Ladies
Under Armour Womens Expedition Weight ColdGear 4.0 Base Layer
Kombi Heavyweight Barrier Pant - Toddler - Als.com
Under Armour ColdGear(R) Base 4.0 1/2 Zip
GOBI HEAT BASECAMP HEATED BASE LAYER PANT - MEN'S, By combining lightweight and flexible material with conductive thread heating elements, Basecamp
Gobi Heat Basecamp Heated Base Layer Pant - Men's
UNDER ARMOR BASE 4.0 LEGGING, BLACK
Women's UA Base 2.0 Leggings