Purchased in 2023 and used 4-5 times. The battery works without any issues. This is a used item, so please understand that it is non-refundable and non-returnable. Size: L 【Importer】TWINTRADE Co., Ltd. / Allegretto Co., Ltd. 【Materials】 ・Glove Body/Fleece Lycra: 95%, Spandex: 5% ・Made-in-Japan Carbon Heating Fiber ※Thin, stretchy, and soft material with a thickness of approximately 0.6mm. 【Heating Duration】 ・Low: Approximately 6.5 hours ・Medium: Approximately 4.5 hours ・High: Approximately 2.5 hours ※May vary depending on the usage environment and individual battery differences. 【Set Contents】 ・Gloves (left and right) x 1 pair ・Lithium Polymer Batteries x 2 ・Charging AC Adapter x 1