Coolspring by Venture Heat 3 Speed Button Control Battery Powered Fan Vest, Model F201C- It's like wearable air conditioning for your body! No need to soak in water, freeze, or fill with ice. Our uniquely designed battery operated fan vest mimicks a windy day and wicks away sweat to cool the body down using air flow. 3 fan speeds are Max, Medium, and Low. Features adjustable straps and Venture Heat's special air circulation mesh, which allows for air to flow through the vest without extra puff or bulkyness. Designed for people from all walks of life. Wear this at a construction site, in line at a theme park, gardening, hiking, traveling, running, and more. A 5000 mAh battery will provide an estimated 10 hour runtime on low, 8 hours on medium, and 6.5 hours on high, but the vest is compatible with most larger capacity USB powered power banks on the market.