Lululemon has filed a lawsuit against Costco that accuses the wholesale club operator of selling lower-priced duplicates of some of its popular athleisure clothing

Lululemon said in a lawsuit filed on Friday, June 27, that Costco “unlawfully traded” on the athleisure brand’s “reputation, goodwill and sweat equity by selling unauthorized and unlicensed apparel employing knockoff, infringing versions” of its products, according to CNN.

People on social media and news outlets have noted that Costco sells items similar to pricey Lululemon apparel — but are they too similar?