Lululemon has sued Costco for selling cheaper copies of its popular athleisure clothing, including Scuba hoodies and Define jackets. Lululemon alleges Costco's Kirkland brand uses unauthorized designs and leverages Lululemon's reputation without disclosing the connection to consumers. The lawsuit, filed in California, seeks to stop the sales and demands unspecified damages. Lululemon argues this infringes on its intellectual property and brand reputation, highlighting significant investment in product research and development. Costco has yet to respond to the allegations.

Prepared by Christopher Adams and reviewed by editorial team.