Terramar Men's Thermolator Climasense 4-Way Stretch Brushed Crew Neck Top Mesh^Polyester^Spandex Imported Features carbon thermoregulation technology: fast wicking and drying Midweight warmth (2.0) makes thermolator extremely versatile Functional thumbholes and strategically placed mesh panels for breathability Ultra-soft Brushed surface Traps air 4-Way stretch for ease of movement