Flexwarm, light and enveloping like silk. The scarf has a sandwich structure containing breathable fiber and a flexible heater film ensuring the right protection to the human body even at very low temperatures. The flexible heater is highly efficient and of temperature evenness and also permits the scarf to be washed by washing machine. It allows users to regulate the heating level by using buttons or an app. The logo “X” is covered by reflective coating and power is achieved via DC cord, connecting with mobile power. Flexwarm is not exclusively dedicated to winter sports, but also the best choice for those who do not want to give up their bike for commuting or sporting in an inclement environment.