Features: brand new and high quality Men air conditioning jackets are made of high-quality polyester fiber (polyester) materials, which can not only quickly evaporate sweat, avoid sweating and odor, but also reduce the skin problems caused by sweat. There are three levels of air volume: strong, medium and weak. You can easily change to the desired air volume. The cooling jackets are easily to be used. Just install the fan, then it can work. Thanks to the ergonomic design, this cooling fan jackets can promote sweat evaporation, improve ventilation and increase air blow to the whole body, finally effectively reduce body temperature. The best gift for outdoor-sports lovers, workers at construction fields, in factories and warehouses with high temperature or humidity. Also suitable for agriculture, leisure, outdoor garden, hiking, fishing and other difficult air conditioning environment and high temperature environment. Specifications: Material: Polyester Fiber (polyester) Type: Cooling Jacket with Fan/Cooling Jacket with Fan and Power Bank/Fan and Power Bank Size: for-M/for-L/XL/XXL(Chinese size ,follow the size chart to select please) Size:M Length:64.5cm(25.39inch) Bust:108cm(42.52inch) Shoulder:44.5cm(17.52inch) Sleeve:23.5cm(9.25inch) Size:L Length:66.5cm(26.18inch) Bust:112cm(44.09inch) Shoulder:46cm(18.11inch) Sleeve:24cm(9.45inch) Size:XL Length:68.5cm(26.97inch) Bust:116cm(45.67inch) Shoulder:47.5cm(18.70inch) Sleeve:24.5cm(9.65inch) Size:XXL Length:70.5cm(27.76inch) Bust:120cm(47.24inch) Shoulder:49cm(19.29inch) Sleeve:25cm(9.84inch) Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item. Package includes: 1x Cooling Jacket