Vitaltech U-Neck Inner Long Sleeve - Enhanced Type for Shoulder Pain Relief - For Women - Brand: ReD - Color: Black - Size: M - Features: Circulation-Boosting Fiber, Fatigue Recovery Reference Price: ¥6,930 From ReD, the makers of the 24-hour recovery shirt. Using MTG's unique special fiber "VITALTECH," which incorporates eight natural minerals, it directly emits far-infrared rays onto the skin to promote blood circulation. With the two major effects of "blood circulation promotion" and "fatigue recovery," simply wearing it turns all your daily time into recovery time. This product (recovery wear) complies with the general medical device "Home Far-Infrared Blood Circulation Promoting Clothing" as defined by the Ministry of Health, Labour and Welfare. Promotes blood circulation, fatigue recovery, improves shoulder and lower back stiffness, relieves muscle tension and stiffness, and reduces muscle fatigue.