Moisture management garment. Designed to be worn next to the skin and to keep the body warm during exercise. Helps prevent excessive muscle oscillation. Self fabric neck binding for comfort. Cover stitch seams to help prevent chafing. Also available in kids' Size chest (to fit) S - 35/36" M - 37/39" L - 40/42" 2XL - 43/45" Fabric 64% Nylon 22% Polyester 14% Elastane. Weight 170gsm