Purchased on Amazon for about 15,000 yen ★ I bought it for my child, but they said they didn't want to wear it, so it's no longer needed. Please note that it has only been tried on once (._.) It's convenient because it comes with a Peltier element and an air conditioning fan set ✤ Quoted from the Amazon page below ↓ 【First in the industry in 2025 & Peltier vest with fan】 We have developed a "Peltier vest with fan" that combines an air conditioning fan and a Peltier element cooling unit. 【One and only design in the world & Double cooling power of fan + cooler & With ice pack pocket】 Combination of Peltier element semiconductor cooling technology and fan cooling: A new cooling method that cools the areas of the body that are sensitive to temperature (back) intensively with a cooling plate and lowers the overall temperature with a fan. The cooling clothing combines a cooling vest and air-conditioned work clothes, working as two pieces of clothing in one, doubling the cooling effect. An ice pack pocket is also included, and when a 500mL ice bolt is inserted, the synergistic effect of the cooling plate and fan achieves an amazing cooling of up to -30℃! 【Instant cooling & Cools up to -30℃ & Storm experience!】 Taking advantage of the characteristics of the "Peltier element" used in refrigerators, you can instantly feel "cold!" from your back to your whole body due to the electronic cooling effect. The aluminum block dissipates heat, providing physical cooling to the back and suppressing the rise in body temperature. The fan specifically for air-conditioned work clothes and fan-equipped work vest is a standard item for the scorching heat of 2025, combining stable airflow and quietness. ✔ Adopting a streamlined 5-blade ultra-thin fan body that applies aerodynamics, reducing wind resistance by 50%. With one button, it sends a 12V high-power storm into the clothes, quickly enhancing air circulation and lowering body temperature. 【Total 60000mAh ultra-large capacity & 21700 high-performance battery & Long-time continuous operation】 Safety and security first. Equipped with two 30000mAh large-capacity batteries that combine compactness and high output! Using the same type of 21700 high-performance battery used in electric vehicles, the lifespan is 3 times longer than conventional batteries, and it can be used safely for more than 5 years. The included batteries have obtained the Japan Electrical Safety Law certification (PSE). Equipped with two 30000mAh large-capacity batteries, it provides up to 8 hours of coolness. (Note: Usage time is an estimate. It varies depending on wearing conditions, usage environment, and number of charges.)