1、High Speed Fan: This cooling vest adopts cooling fan with 3 speed modes, so the wind flows from the bottom to the top, blowing to every part of the body. 2、Comfortable Material: This cooling jacket adopts premium polyester fiber and nylon material, and inbuilt breathable mesh layer ensures great comfort. 3、Power Bank Powered: This body cooling vest can be easily powered by power bank(not included), easier and more convenient to use. 4、Brushless Motor: This cool vest adopts brushless DC motor which provides up to 4500RPM high speed, which ensures fast heat dissipation and longer service life. 5、Wide Application: This cooling vest is perfect for outdoor photography, fishing, golfing, railway workers, construction workers, airport ground staff, motorcycle riding and other outdoor activities. Item Type: Cooling Vest Material: Polyester Fiber Nylon Speed Mode: 3 Fan Speed Mode. Comfy Wind for 1st Mode, Cooling Wind for 2nd Mode, Strong Wind for 3rd Mode (Power Bank Not Included) Application: Indoor, Outdoor, Construction Workers, Outdoor Adventure, Etc S: Length: 62cm / 24.4in, Bust: 114cm / 44.9in, Shoulder: 44cm / 17.3in, Suitable Height: 155-165cm / 5.1-5.4ft, Suitable Weight: 47.5-57.5kg / 104.7-126.8lb M: Length: 64cm / 25.2in, Bust: 118cm / 46.5in, Shoulder: 45.5cm / 17.9in, Suitable Height: 160-170cm / 5.2-5.6ft, Suitable Weight: 57.5-67.5kg / 126.8-148.8lb L: Length: 66cm / 26.0in, Bust: 122cm / 48.0in, Shoulder: 47cm / 18.5in, Suitable Height: 165-175cm / 5.4-5.7ft, Suitable Weight: 67.5-77.5kg / 126.8-170.9lb XL: Length: 68cm / 26.8in, Bust: 126cm / 49.6in, Shoulder: 48.5cm / 19.1in, Suitable Height: 170-180cm / 5.6-5.9ft, Suitable Weight: 77.5-85kg / 170.9-187.4lb 1 x Cooling Vest 2 x Fan 1 x Cable 1 x User Manual