Omni-Heat Thermal Reflective breathable material on the core, shoulders, and arms regulates your temperature with silver dots that reflect and retain body heat * Omni-Wick on the sides and underarms pulls moisture away from the body and enables perspiration to evaporate quickly, keeping you dry and comfortable * 4-way comfort stretch for superior mobility, Raglan sleeves and ergonomic seaming for comfort and better coverage, Thumb holes for coverage and security, Antimicrobial, Imported * Omni-Heat thermal reflective waffle 85% polyester/15% elastane. Omni-Wick inserts at side and under arm