The Gareth is a do-it-all shirt for work or play in cold climates. Back on Track shirt fibers are infused with our bio-mineral formula that absorbs, emits and reflects far infrared rays. It’s these wonderful and natural therapeutic rays of light energy that stimulate cellular activity, boost circulation, relieve pain and swelling.Far infrared (FIR) therapy involves the use of far infrared rays to gently heal, soothe, stimulate and detox the body.Far infrared rays are invisible waves of energy that can penetrate all layers of the human body, right into the inner-most regions of the tissues, muscles and bones, naturally generating heat by causing the subcutaneous proteins, collagens, fats, and water molecules to vibrate, elevating tissue temperatures and causing the blood vessels to dilate. Scientific studies show that this improvement in blood circulation delivers more oxygen to the tissues, which provides a range of therapeutic effects.With the continuous research and development into functional yarns and fabrics, it is now possible to experience the benefit of FIR therapy through far infrared emitting clothing and apparel.The performance-knit fabric wicks sweat and moves with you for comfort in a range of temperatures. Our consumer feedback has been so positive that the shirt has shifted from a ‘men’s’ shirt to a unisex piece. It has a really nice weight and soft feel to it, wears well and washes easily.