Lululemon alleges that Costco has stolen the intellectual property of its Scuba hoodies and sweatshirts, Define jackets and ABC pants.

Dupes are a common phenomenon in fashion, but they have risen in popularity in recent years thanks to social media influencers. Costco carries men’s, women’s and children’s clothing, including activewear such as yoga jackets, leggings and joggers.

Because of this, Lululemon claims this leads at least some shoppers to believe that Kirkland-branded products are made by the authentic supplier of the "original" products. Lululemon claims Costco doesn't try to dispel the ambiguity.