Cricket captain Virat Kohli says being a brand ambassador comes with its share of responsibilities.Virat has launched the first performance footwear from the brand evoSpeed One8 for Puma.Asked if being a brand ambassador is a huge responsibility, Virat told IANS in an e-mail interview: "I certainly believe that being a brand endorser comes with its share of responsibilities. While endorsing a brand, you are essentially putting your stamp of approval on it, and asking your fans to follow suit and use it."Personally, I do not believe in representing something that I myself do not use, which is a main reason why I do not sign on with brands that I do not consume," he added.Talking about his evoSpeed One8, he says he has been a part of it since the beginning."In case of evoSpeed One8, I have been involved right from the development phase of the footwear, and I am happy to see the product come to life," he added.On the work front, Virat's team Royal Challengers Bangalore (RCB) has been knocked out of the ongoing Indian Premier League.