Description: - 【Innovative Cooling Technology】: This vest utilizes water evaporation for physical cooling, ensuring consistent and uniform cooling without the risk of overcooling - 【Efficient Cooling Coverage】: The back of the vest cools evenly and continuously. It covers two thirds of the back area for optimal comfort - 【Enhanced Breathability】: Cooling vest is designed with breathable mesh fabric, this vest allows natural air to dissipate heat effectively, offering comfort without any stuffy feeling - 【Versatile Use】: This vest ideal for various professions and sports that require cooling solutions, like outdoor activities , fishing, traveling, exploring or in high temperature environments like workshops, - 【Easy to Use】: Simply fill each front section with 500ML of water and the back section with 1000ML, lay flat to distribute water evenly, then refrigerate for 1-4 hours Specification: - Material: Polyester TPU Size Chart: M: Length 52cm/20.47inch, Bust 89cm/35.04inch, Swing 82cm/32.28inch, Total Shoulder Width 36.1cm/14.21inch L: Length 54cm/21.26inch, Bust 93cm/36.61inch, Swing 86cm/33.86inch, Total Shoulder Width 37.3cm/14.69inch XL: Length 56cm/22.05inch, Bust 97cm/38.19inch, Swing 90cm/35.43inch, Total Shoulder Width 38.5cm/15.16inch Package Includes: 1 Cooling Vest Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.