The lightweight Browning Men's 120 Merino Crew Shirt is the ideal foundation for warmth. Its itch-free, 100% Merino wool is warm, wicking, dries fast, and odor-resistant, making it the perfect base layer. Birdseye mesh underarm panels provide ventilation, keeping you comfortable when pursuing game or skiing. Features100% Merino wool main body fabric120 gram weight17.5 micron threadBirdseye mesh underarm panels for ventilationIntegrated panel thumb holes