[Korobani] Sleep & Rest Support Far Infrared Long Sleeve T-Shirt for Comfortable Sleep, Sleepwear, Crew Neck, Cotton Material, 5.6 oz. 【Patent Pending】 Brand new, unopened. Reference price: 11,000 yen 【Warmth while you sleep】 The patented material "Spa All," which contains hot spring minerals and charcoal, comfortably supports you with the warmth of far infrared rays. For a good night's sleep and rest. It leads the autonomic nervous system to an ideal balance. 【Supports a good night's sleep and recovery】 By wearing it at bedtime, it conditions the body and supports a relaxed state. 【Comfortable to wear with skin-friendly cotton material】 100% natural cotton (outer fabric) combines a soft texture with breathability. Comfortable even for long hours of wear. 【Light stretch】 Designed to fit various scenes such as relaxation time, before bed, and before and after light exercise, as an inner garment to support relaxation time.