Reebok Outdoor Thermal Long Sleeve Men's Shirt in Solid Grey For Layering. Stay warm and dry with Reebok thermal long-sleeve shirt for men. This base layer is designed to wick away moisture and reduce chafing with flatlock seams. Elastic cuffs keep your sleeves in place during cold-weather activities. Fabric: 100% Polyester, double knit fabric for warmth and stretch. Fit: Slim - skims the body for comfort and freedom of motion during exercise. Designed for: Base layering, outdoor sports, cold weather. Speedwick technology wicks sweat away from the body to help you stay cool and dry. Soft elastic cuffs for a comfortable fit. Flatlock stitching sits flat against the skin and prevents chafing. Color: Solid Grey.