Purchased on Amazon in May 2025 and used several times this season. It shows some signs of use, but the operation has been confirmed. *Please refrain from purchasing if you are concerned about the smell of tobacco, as it has been in and out of smoking areas. Accessories: Battery, instruction manual Thank you. Product Description 【A New Dimension in Cooling Technology: Unbeatable 2400cm² Wide-Area Cooling & -20℃ Rapid Cooling】 A domestically developed integrated water-cooling system constructs a water flow network that covers the back, shoulders, underarms, and abdomen. It exhibits astonishing cooling performance, instantly lowering the perceived temperature by 20°C when used in conjunction with frozen plastic bottles or ice. Considering the burden on the heart, the circulation path has been optimized, intentionally avoiding cooling around the heart! This "body temperature management system that transcends the concept of cooling clothing" establishes a new standard for heatstroke prevention, minimizing the burden on the body even in harsh environments. 【Industry's Highest Output 13V 15,000mAh & 40-Hour Continuous Operation Ultra-Class Battery】 Both cooling performance and durability are achieved! The industry's top-class 13V 15000mAh ultra-large capacity battery maintains high output, achieving unbeatable cooling effects, and at the same time, can be used continuously for up to 5 days (based on an 8-hour workday) on a single charge. It has cleared the strictest safety standard JIS C 62133-2 enforced in Japan and has obtained the Electrical Appliance and Material Safety Law PSE certification. Furthermore, it has passed a 5000-hour continuous load test by a third-party organization, demonstrating professional-grade reliability. 【Industry's Strongest 1000ml/min Water Flow & 38dB Ultra-Quiet Design】 Equipped with an ultra-high-performance pump from Panasonic/Tesla's official supplier! The water-cooling pump, equipped with a revolutionary Japanese-made motor, achieves a maximum flow rate of 1000ml/min while maintaining an ultra-quiet design of 38dB or less. In addition, the specially designed high-quality insulation and soundproof silicone cover further enhances comfort during work. It overcomes the noise problems of conventional air-conditioned workwear, opening a new dimension of "cooling performance" and "environmental adaptability." 【Innovative Reconstruction of the Water Cooling System】 The water channels are built into the vest, and it can be used immediately without tubes and installation. Ergonomically verified with zero pressure, the high-elastic silicone water channels withstand 10,000 bending tests without damage. Fine water channels are arranged throughout the fabric, and the uniform distribution design cools the entire body evenly. Furthermore, the aluminum-processed insulated outer fabric + high-cooling silicone intermediate layer reduces heat loss to less than 25% and extends the cooling duration by 200%.