This "fatigue recovery wear" incorporates ceramic-embedded fibers and is a genuine recovery item registered as general medical equipment. These special fibers absorb far-infrared energy emitted from the body and redirect it back. This promotes blood circulation and alleviates muscle stiffness and soreness, leading to fatigue recovery. Furthermore, the wear uses a smooth fabric of 80% polyester and 20% cotton, with wearers reporting, "It's comfortable to wear" and "I wear it every day!" The effects are enhanced the more the ceramic-infused fabric comes into contact with the skin, so wearing the top and bottom set is recommended. "This product is a medical device in the form of clothing, designed to improve symptoms such as fatigue and muscle stiffness through the far-infrared blood circulation-promoting effect resulting from the emission of a certain amount of far-infrared rays by high-purity ceramic fixed to the raw material fibers."