Icebreaker Tracer Running Tight - SS16 Made in USA Merino Wool - A natural, lightweight fabric that helps to regulate body temperature for optimal comfort. Moisture Management - Effectively draws moisture away from the body so that you remain cool, dry and comfortable. Naturally Odour-Resistant - Helps you to feel fresher for longer. Lined Gusset - Offers freedom of movement for an unrestricted workout. Reflective Piping - Keeps you safe when you're running at dawn or dusk.