The KENDO Heel Supporter [KA-4B] is a heel pad featuring thicker padding than the KA-2B model, offering enhanced support for the impact of fumikomi practice and added comfort for sensitive heels. With a 10mm thickness, it has become a popular choice among users who previously used the KA-2B and transitioned to this model. Please note that it runs in Japanese sizing, so we recommend selecting one size up. Available sizes are Small (17cm - 19cm shoe size), Medium (20cm 22cm shoe size), Large (23cm - 25cm shoe size), X-Large (26cm - 27.5cm shoe size).