According to JD.COM's official flagship store 36 1, Su Mao 2.5pro is designed with corrugated fiberboard instead of carbon board.

36 1 Group is a comprehensive sporting goods company, which was established in 2003 and successfully listed in Hong Kong in 2009 (stock code 0 136 1 HK). As one of the leading sporting goods companies in China, 36 1 Group has four sections: sports, children, overseas business centers and e-commerce centers.