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