Material: Polyester As a thermal processing material, it contains chamomile and capsicum tincture, which have the effect of promoting blood circulation. The capsaicin contained in the capsicum tincture stimulates the pain points on the surface of the skin, increasing blood flow and stimulating the peripheral nerves, utilizing a mechanism that makes you feel warm. Made in Japan #SakuraWasoKomonoWasoUnderwear #Haneri (Collar) #Nagajuban (Long Undergarment) #WasoKomono (Japanese Clothing Accessories)