The warmest, lightest, driest next-to-skin men's baselayer in its class.

WHAT’S IT DO? Let’s be clear: this ain’t your daddy’s long underwear. Our Men’s UA Base™ 2.0 Longsleeve Crew is 46% warmer, 35% lighter, and 33% drier than the competition*. That’s right, better. So you can be, too. Layer up with our thermal grid, heat-trapping, warmth-circulating fabric and power your way past the pack. Go ahead, break a sweat. We’ll be right there with moisture-wicking backup. Trust the comfort-stretch and odor-fighting technology we’ve built in to keep you from feeling weighed down or uncomfortable during intense outdoor training. These are your tools. This is your time. Outperform on the mountain. Outlast on the trail. Outclass them all. *Compared to The North Face Midweight, Patagonia Capilene 3, Hot Chillys Original II, Icebreaker BodyFit 260, SmartWool Midweight

• ColdGear® UA Base™ 2.0 is highly versatile mid-weight protection for colder conditions and a variety of activity levels
• Lightweight 4-way stretch fabrication improves range of motion and dries faster
• Signature Moisture Transport System keeps you warm, dry, and comfortable