The Men's STAY WARM Coffee Charcoal Mock Neck Functional Fit Long Sleeve  Half Zip (Sio21), is a long-sleeve, that delivers a tailored fit that is best suited to accommodate full-range of motion activities. The Men's Stay Warm Coffee Charcoal Long Sleeve Half Zip (Sio21), is enhanced with our Coffee Charcoal fabric, which has been engineered to help the athlete stay warm, dry and comfortable in frigid climates.