1、Microporous Breathable: Circulating air, microporous breathable, air conditioning clothing can make a large amount of air outside the body along the body surfaces parallel flows, so that sweat evaporates instantly. 2、Working Principle: Through the waist 2 fans blowing wind, accelerate the evaporation of sweat on the surfaces of the body, from the neck and cuffs circulation discharge, to achieve thes purpose of cooling the cool. 3、Fast Cooling: A key to open the mode of wind quickly cover the body surfaces exhaust heat dissipation fast, physical rapid cooling. 4、3 Adjustable Wind Speed: The fan uses three adjustable wind speed to meet your different needs, oblique flows wind blade design, large air volume. 5、Multipurpose: Cooling vest not only cooling, but also sun protection, the fan uses brush motor work with little noise, life expectancy up to 6000 hours. Item Type: Air Conditioned Clothes Material: Polyester, ABS, PC, PP, cotton Number of Levels: Three Levels, One Comfortable Wind, Two Cool Wind, Three Strong Wind Applicable Scenes: Indoor Environment, Outdoor Environment, Construction Workers, Outdoor Adventure, Etc. Size: Approx. M: Length 64.5cm / 25.39in, Bust 108cm / 42.52in, Shoulder Width 44.5cm / 17.52in, Sleeve Length 23.5cm / 9.25in L: Length 66.5cm / 26.18in, Bust 112cm / 44.09in, Shoulder Width 46cm / 18.11in, Sleeve Length 24cm / 9.45in XL: Length 68.5cm / 26.97in, Bust 116cm / 45.67in, Shoulder Width 47.5cm / 18.7in, Sleeve Length 24.5cm / 9.65in XXL: Length 70.5cm / 27.76in, Bust 120cm / 47.24in, Shoulder Width 49cm / 19.29in, Sleeve Length 25cm / 9.84in Clothes Color: Gray Fan Color: Black 1 x Cooling Vest 2 x Fan 1 x Cable 1 x User Manual