100% Polyester Imported Zipper closure Machine Wash This Cooling Vest comes with 2 removable fan that can improve ventilation and increase air blow to the whole body, promote sweat evaporation, finally effectively reduce body temperature, avoid heavy sweating and heat stroke. There are three levels of air volume (high, middle and low), the button can easily adjust, low noisy. It's convenient to attach to clothes, USB cable works for most power sources. (Package not includ power bank!) The Cooling Jacket made of 100% polyester, heat resistant, breathability and light weight for easy to carry. Scratch resistant, wear resistant, UPF 50+ anti-UV, suitable for outdoor work. (Please remove the fan when cleaning) We have 4 size, simple style for all men & women, Suitable for worker, contruction, gardening, hiking, walking, cook, guide, farmer or warehouse worker, ect. This product is delivered under strict quality control before shipment, but in the event that there is something wrong, please contact us immediately as we will solve for you within 24 hours. Show more