The work vest, from Trizand company, fits perfectly on the body and mainly prevents heat loss. Thanks to the USB cable it has in the inner pocket, you can connect it to a power bank and when the temperature drops, the built-in system allows you to instantly warm your body. It has 3 levels of heating in 9 zones. The shell of the vest is made of 100% nylon which is characterized by high resistance and prevents wrinkling. The lining and filling are made of 100% polyester, which effectively protects against cold and wind.