While some investors have been concerned that lululemon athletica's (LULU 1.94%) trendy niche market could go out of fashion as fickle consumers jump from the yoga craze to the next big thing, in this video, Motley Fool analyst Austin Smith argues that we have seen several companies have huge levels of success recently as they tap into the greater health and wellness movement in the U.S. Austin also highlights the company's lack of debt, and the powerful voice of advocacy that Lululemon's customers put behind the company.