The Kosmodisk Sports Beltis is a special Kosmodisk model, composed of a back belt and a larger lumbar Kosmodisk. The belt is made of a high quality cotton-polyamide elastic material, plesant to touch and wear. The massaging effect of Komodisk stimulates the muscles close to the lower back area. That in turn generates warmth which eases blood-citculation which soothes your muscles and reduces tension.