BULONCHI's Peltier vest with instant cooling function, free size, battery-powered. - Brand: BULONCHI - Type: Peltier vest - Features: Instant cooling function - Size: Free size - Power: Battery-powered Thank you for viewing. Brand new, unused. Quiet, lightweight, free size, for both men and women. Can be used in conjunction with air-conditioned clothing. Perfect for hot work sites, agricultural work, and outdoor activities! I am selling one because I bought two and have a spare. Immediate purchase is welcome. Please feel free to ask if you have any questions. Since it is unopened, please see the website for detailed product photos.