Lululemon is suing Costco, accusing the retailer of selling knockoff versions of its high-end athleisure wear under the Kirkland brand.

The lawsuit claims Costco’s lookalike products mislead consumers into thinking they’re authentic Lululemon items, damaging the brand’s reputation.

Lululemon seeks monetary damages and a court order to stop Costco from selling the alleged copies, CNN has reported.

This comes as Lululemon faces declining store visits, rising competition, and a 37% drop in its stock price this year.

Written by B.C. Begley