New sauna belt. This product is sold on Amazon for 4,378 yen. I will sell it at a lower price. Waist 56-75cm Sweat-promoting sauna material for efficient "waist care": "The special inner material traps body heat, like a "wear-only sauna." It warms the waist area intensively, supporting efficient sweating and shaping up." Double belt structure allows you to adjust the tightness to your liking: "With a double design of 4-stage hooks + an outer reinforcement belt, you can freely choose between "I want to tighten it firmly today" and "I want to keep it loose"." Back support function to maintain beautiful posture: "The wire built into the surface firmly supports slouching and swayback. It also improves your style with posture correction effects. It is also useful for improving posture during long hours of desk work and standing work." Versatile design that can be used daily or during exercise: "Recommended for yoga, running, gym training, as well as "wearing while doing" activities at home or housework. Simple design that is not noticeable under clothing." Tighten your waist for an ideal, well-defined body: "Naturally supports the waistline with a double approach of tightening and warming effects."