1、Cold Air Circulation: Air passing through the mesh will be evenly evacuated through the mesh to the whole body, cold air circulation temperature and then reduce 20%, the inner mesh anti sweat, and air permeability. 2、Simple to Operate: Exhaust heat dissipation, a key to open the mode, the wind quickly cover the body surfaces, even in the hot working environment, can keep cool. 3、Improve Work Efficiency: Cool vest can quickly evaporate sweat, effective prevention of heat stroke, can improve work efficiency, the fan is lightweight. 4、3 Levels Adjustable: Body cooling vest with three adjustable winds to meet your different needs, dual side zipper pockets, USB port, easy to connect power bank. 5、Multipurpose: Air conditioned clothes with elastic edge wrap, soft and comfortable, not only cool but also sun protection. Item Type: Cooling Vest Material: Polyester Number of Levels: Three Levels, One Comfortable Wind, Two Cool Wind, Three Strong Wind (Shipped Without Power Bank) Applicable Scenes: Indoor Environment, Outdoor Environment, Construction Workers, Outdoor Adventure, Etc. Size: Approx. S: Length 63cm / 24.8in, Shoulder Width 41cm / 16.14in, Bust 112cm / 44.09in, Suitable Height 155-165cm / 61.02-64.96in, Suitable Weight 40-55kg / 88.2-121.3lb M: Length 65cm / 25.59in, Shoulder Width 43cm / 16.93in, Bust 116cm / 45.67in, Suitable Height 160-170cm / 62.99-66.93in, Suitable Weight 52.5-67.5kg / 115.7-148.8lb L: Length 67cm / 26.38in, Shoulder Width 44cm / 17.32in, Bust 120cm / 47.24in, Suitable Height 165-175cm / 64.96-68.9in, Suitable Weight 65-75kg / 143.3-165.3lb XL: Length 69cm / 27.17in, Shoulder Width 46cm / 18.11in, Bust 124cm / 48.82in, Suitable Height 170-180cm / 66.93-70.87in, Suitable Weight 72.5-82.5kg / 159.8-181.9lb XXL: Length 71cm / 27.95in, Shoulder Width 47cm / 18.5in, Bust 128cm / 50.39in, Suitable Height 175-185cm / 68.9-72.83in, Suitable Weight 80-90kg / 176.4-198.4lb Fan Color: Black Vest Color: Gray 1 x Cooling Vest 2 x Fan 1 x Cable 1 x User Manual