Fitted: Next-to-skin without the squeeze. UA Base™ 2.0: Versatile mid-weight layering for cold conditions. Thermal grid fabric traps heat in tiny pockets for long-lasting protection. Quick-dry construction wicks moisture to keep you drier, lighter & more comfortable. 4-way stretch construction moves better in every direction. Anti-odor technology prevents the growth of odor-causing microbes. Raglan sleeves. Flatlock seams eliminate chafing. Thumbholes keep sleeves secure & help seal in your body heat. Polyester/Elastane Imported