UA Microthread fabric dries faster, does not stick, does not chafe and is flexible without absorbing sweat. The material wicks away sweat and dries very quickly. 4-Way Stretch technology for better movement in every direction. Balaclava hood with perforation in the mouth area for better ventilation. Built-in thumb holes help keep the sleeves in place. Lowered, contoured hem and raglan sleeves. Silicone graphic details. Odor control technology minimizes odors.