This document provides an analysis of Under Armour and lululemon athletica, two companies in the performance apparel industry. It discusses the industry information, key issues, trends, companies' goals, challenges, performance, business strategies, differences in business models, and competitive advantages. Recommendations are made for each company, including intensifying geographic expansion for lululemon and boosting sales/gaining market share through innovative products for Under Armour. Financial data and exhibits are provided in the appendices.