Because of the deep discount, this is a final sale. This product is not eligible for refunds or exchanges and is not covered by our warranty. The AlphaCool 7V Circulatory Cooling Vest with a built-in water circulation unit brings the highest quality cooling technology into a compact vest for better wearability and easy operation. It includes a 3L quick-release bladder, a mini pump, a rechargeable battery, and a liquid cooling channel embedded in a mesh liner. The mini pump circulates cold water that will continuously flow throughout the vest, keeping it cool and comfortable in hot conditions. It features a waterproof and breathable outer fabric, 3D material interlay, and a double lines stitching cooling channel layer for maximum comfort. Features: Ergonomically cooling design, front zipper with adjustable sides Waterproof and breathable outdoor fabric, double stitching cooling channel mesh 3L freezable, easy to clean, quick-release bladder 7.4V 2200mAh battery 2 - 4 hours of cooling from using a frozen bladder, 1 - 3 hours using ice cubes Cooling temperature range 36°F-68°F (2°C-20°C), Noise: 48dBA Note: This is an open box item. The product itself has been tested and deemed fully functional. "Open Box" may mean one of the below: Damaged Packaging Discontinued Version Unused Returned Item Open Box AlphaCool 7V Circulatory Cooling Vest System