A legal battle between Lululemon and Costco raises questions about quality, branding, and value in the sportswear market.

Lululemon Athletica Inc. LULU filed a patent infringement lawsuit against Costco Wholesale Corp. COST on Friday, alleging the warehouse retailer violated intellectual property rights by selling ...

Some of the alleged fakes Vancouver-based Lululemon identified were sold under Costco’s private label Kirkland, but others ...

While golf attire was once uniform-like, what it means to "dress like a golfer" is now ever-changing. Golf apparel brands are expanding their offerings to fit many different looks, skill levels and ...

Costco Wholesale Corp. has denied accusations from Lululemon Athletica Inc. that it infringed on the athleticwear company’s ...

Specifically, Lululemon alleges that Costco sold knockoffs of its athletic apparel and other clothing, violating its ...