Necklaces designed to maximize their effectiveness as health accessories. Recommended for: Those who want to improve their running form (concerned about ground contact balance, weak core) Those who want to run long distances with less damage, or run more efficiently Those who want to reduce the risk of injury and run healthily for a long time Trail runners Those suffering from stiff shoulders or lower back pain Those with poor balance (unable to stand on one leg with eyes closed for more than 40 seconds) https://holosrc.com/kernel/ is the official website. The chain is a Phiten titanium necklace and its included accessories. Thank you for viewing. Price reduction is negotiable. Retail price: 35,000 yen