Achilles tendon and calf supporter. Set of 2. These offer strong support. I bought these because my child was doing kendo and experiencing Achilles tendon pain, but one is unused, and the other has only been used a few times. The retail price was around 2000 yen. Please understand that these are items stored at home. Suitable for kendo, as well as tennis, volleyball, walking, jogging, etc. From the following website: Achilles tendon and calf protection supporter EX Size: M Material: Nylon Polyester Polyurethane Contents: For both left and right (1 piece) Color: Black Made in Japan Protection & warmth with a structure and design based on taping theory Are your feet easily tired...? Worried about Achilles tendon rupture...? Want to prevent muscle strains! Recommended for those people! It supports from the sole of the foot to the calf, preventing injuries around the Achilles tendon! In order to enhance the prevention of lower limb injuries, including Achilles tendon rupture, it is essential to protect and warm the entire area from the sole of the foot to below the knee. This is because the plantar muscles, Achilles tendon, and gastrocnemius muscle are connected via the calcaneus. Although they seem unrelated because they are separated, when the plantar fascia is tense or inflamed, the plantar muscles contract, pulling on the Achilles tendon, which is constantly under stress. In fact, this can sometimes cause a rupture. By widely covering the sole of the foot, the taping effect is enhanced, protecting the areas prone to Achilles tendinitis. Also, applying moderate pressure to the plantar muscles helps to reduce fatigue and relieve the Achilles tendon. "Applying moderate pressure," neither too tight nor too loose, is important for reducing fatigue in the lower limbs and relieving stress on the Achilles tendon. *This product is intentionally made slightly tighter to enhance its effect. Some people may find it difficult to put on, depending on the size of their feet or the height of their instep.