Coreforce Loop Black 70cm Authentic product, retail price 41,800 yen Price increased from May *Discounts are not available, so please refrain from comments asking for a discount. Warranty and membership card are also included, so you can rest assured. Many active professional golfers and professional baseball players use this product. For middle and high school student athletes who cannot wear it around their neck or arms during practice or games, the effect can be obtained by putting it in a small ziplock bag and placing it in their uniform. This Coreforce product works within 3cm of the body. Opened once for photography. Immediate purchase is OK! In principle, we cannot reserve items. The person who purchases first will be given priority. If you are in a hurry for shipping, please consult with us. (We may not be able to meet your request.) Thank you.