Heated waistcoat is water and wind-resistant to withstand all bad weather. It's tailored for comfort and unrestricted movement with its intuitive design, slim-cut design offers you a snug fit so you can better feel the warmth carbon fiber heating elements. Perfect for outdoor activities, walking your pets, camping, hiking, fishing, hunting; underneath your winter jacket or even in a way-too-cold office and business outdoor. Abrasion resistant durable nylon outshell and carbon fiber heating elements are completely safe for hand and machine washing. Please remove the power bank and removable connected usb cable, zip of pocket up before washing, then put the vest into a laundry bag for machine washing. heated clothes makes this winter without heavy coats and irresistible cold. Skin-Friendly Lightweight design, easy to carry, strong warmth, resist cold invasion, a real electric heated body warmer for mens / womens / youth / elderly. Instructions for use: Take out the power bank, add neutral detergent to wash it by hand, do not rub or beat it forcefully, and use it after the washed clothes are naturally ventilated and dried. Precautions: 1 Please do not connect to the power bank for long-term use 2 Do not use high temperature water and strong acid detergent 3 Turn off the power before getting wet, and continue to use after drying 4 The usage time depends on the capacity of the power bank Size: S Shipping color: black Shipment Quantity: 1 Women Heating Vest Autumn and Winter Cotton Vest USB Infrared Electric Heating suit (Black,Size S)