This is a new, unused set of top and bottom in size M. ● Special minerals absorb and radiate far-infrared rays. ● The far-infrared rays emitted by the body are radiated by high-purity ceramics kneaded into the fibers using our unique technology. This far-infrared radiation promotes blood circulation, creating an environment that alleviates fatigue. ・Fatigue reduction ・Improved blood circulation ・Relief from muscle stiffness and soreness ・Reduced muscle fatigue ◎ Room Shirt (Short Sleeve) Material Main Body: 80% Polyester, 20% Cotton Collar Ribbing: 60% Polyester, 35% Cotton, 5% Polyurethane ◎ Room Pants Material: 80% Polyester, 20% Cotton