Under Armour Base 4.0 ColdGear Long Sleeve Size:S Inner pocket within thermal liner

Inner pocket within thermal liner

blended interwoven fiberglass fibers made to FMF's specifications for high heat resistance

more aggressive sound

Upper construction is made from innovative and light microfiber material that is flexible and abrasion resistant

Quick drying polyester mesh and microfiber PU upper

Under Armour Base 4.0 ColdGear Long Sleeve Size:S Inner pocket within thermal linerUA Base is a system of baselayers, numbered from 2. 0 4. 0, that takes you from cold to absolutely freezing temps. It uses a special negative grid structure to trap heat without adding bulk. Think long underwear, re engineered for athletes performing at their peak. UA Base 4. 0 is built for extreme cold weather and lower activity levels. FEATURES Fitted: Next to skin without the squeeze. UA Base 4. 0 Extreme Baselayer is the warmest yet, locking in