M Packaged Base 4.0 Legging

The Under Armour M Packaged Base 4.0 Legging delivers proven thermal protection engineered for athletes and outdoor professionals who demand warmth without excess bulk. Designed for base-layer performance across tactical, athletic, and adventure applications, these leggings provide the foundation for reliable temperature regulation in demanding conditions. Whether you're training, deploying, or working in cold environments, the Base 4.0 construction offers the trusted warmth that Under Armour's base layer line is known for, now refined for superior comfort and fit.

The M Packaged Base 4.0 Legging features a softer, smoother fabric construction that reduces skin irritation during extended wear while maintaining UA's signature moisture-wicking properties. The engineered fit ensures freedom of movement without restricting mobility, critical for tactical operations, athletic training, or layering systems. The legging's technical design balances thermal retention with breathability, preventing overheating during active use while delivering consistent warmth during cold exposure. At 0.93 lbs, the garment provides substantial insulation in a lightweight package that won't add bulk under outer tactical gear or cold-weather apparel.

Ideal for military personnel, law enforcement, outdoor enthusiasts, and cold-climate workers, the M Packaged Base 4.0 Legging serves as a core component of effective layering systems. The medium sizing and refined fabric quality make it compatible with standard tactical uniforms, athletic wear, and outdoor gear without bunching or excessive compression. These leggings perform best as a base layer directly against skin, allowing moisture to wick away while trapping warmth. For maximum effectiveness in extreme cold or high-output activities, pair with appropriate mid-layer and outer shell garments tailored to your specific mission or environment.