Lululemon Athletica claims in its lawsuit filed in the U.S. District Court for the Central District of California that Costco has “unlawfully traded” on its reputation, goodwill and sweat equity by selling unauthorized and unlicensed apparel that uses knockoff, infringing versions of its patents.

Renowned apparel brand Lululemon has reportedly sued the popular membership-based warehouse club Costco. According to a People report, Lululemon filed a lawsuit in federal court in California on June 27, 2025. The legal dispute stems from Lululemon’s claim that Costco sold imitations of its signature apparel under the Kirkland brand.

This Costco product recently went viral (again), with fans on social media claiming it’s different. The price? Just $12.99. And while I may not be sold, I also can’t blame the shoppers who are. Because when something looks this close to a $94 best-seller for a fraction of the price—it makes even the most loyal Vuori girlie (myself included) think twice.