I set it up once, powered it on, and confirmed its functionality. It has never been used outdoors. It is practically unused. This is a cooling vest using a Peltier element, capable of cooling down to -23°C. From BODY TOUGHNESS, a brand by Otafuku Glove Co., Ltd. (Headquarters: Minoo City, Osaka Prefecture; Representative: Yuki Idobata), a long-established work glove manufacturer that has been pursuing comfort in on-site work for many years, the groundbreaking new product "BT Ability Peltier Cooling and Heating Vest Battery Set" was released in 2025. Otafuku Glove has newly developed and released workwear that uses Peltier elements for both cooling and heating. This product is a professional-spec vest-type wear that uses Peltier elements for both cooling and heating. It employs the latest 30mm Peltier element and a 60mm large plate, allowing you to switch between cooling and heating with a single switch. It supports on-site work throughout the year, from the scorching heat of midsummer to the extreme cold of midwinter. ・ Main Features of the Ability Peltier Cooling and Heating Vest: Feature 1: Powerful Cooling & Comfortable Heating Modes Cooling has 4 levels: "Fluctuating Strong Cooling," "Strong Cooling," "Medium Cooling," and "Weak Cooling." Heating has 2 levels: "Fluctuating Strong Heating" and "Fluctuating Weak Heating." A total of 6 modes are available. These 6 modes can be switched with "one-touch operation." Feature 2: Long-Lasting Battery Equipped with a standard 20,000mAh high-capacity battery that supports USB Power Delivery. (Supports fast charging) It can operate continuously for approximately 12 hours (in weak cooling mode) and up to approximately 25 hours (in fluctuating weak heating mode). (In the recommended fluctuating strong cooling mode, it can operate for a maximum of approximately 8 hours.) * The temperature and battery operating time may vary slightly depending on the environment. The battery has obtained the PSE mark, ensuring safety. Feature 3: Customizable Flexible Design ・ The cooling and heating devices are equipped with 3 units: one on the back and two on the sides. ・ One of the cooling and heating devices can be removed and attached to the shoulder straps of a backpack using the included attachment. A new concept for cooling the neck! ・ The devices can be easily attached and detached with a half-turn, making washing smooth. Feature 4: Free Size Fits Both Men and Women - Size: Free Size Suitable for heights from 155 to 185 cm Suitable chest size from 80 to 116 cm Purchased on Amazon for 23,980 yen including tax.