Red, 100% cotton M-size shorts, comfortable to wear. - Color: Red - Size: M - Material: 100% Cotton The Red Energy of Health Promotes health, rejuvenates Boosts energy, for those who feel cold What is Tanden? There is a pressure point about two finger widths below the navel. This is called the Tanden, and covering the Tanden with red underwear stimulates it, strengthening the flow of energy and improving blood circulation. Thank you for viewing.