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
Men's Intraknit Thermal Merino Base Layer 1/4 Zip
Men's Intraknit Thermal Merino Base Layer 1/4 Zip
UA Base 4.0 Extreme Baselayer is our warmest yet, locking in your body's heat to deliver extreme warmth in the extreme cold. UA Scent Control
Under Armour Mens Packaged Base 4.0 1/4 Zip T-Shirt, Black
UA Playoff 2.0 1/4 Zip - Golf Central Halifax
UNDER ARMOR BASE 4.0 LEGGING, BLACK
Under Armour Men's ColdGear Base 4.0 Leggings
Under Armour Cold-Weather Compression
Under Armour® Men's ColdGear® Base 4.0 1/4-Zip Long-Sleeve Shirt
Under Armour Men's UA HeatGear® Armour Long Sleeve Compression
Under Armour Men's ColdGear Base 4.0 Leggings
Under Armour Base 4.0 Review
Men's UA Expanse Specialist ¼ Zip
Under Armour Men's Packaged Base 4.0 1/4 Zip T-Shirt, Shirts - Canada