Lululemon’s stock is on pace for one of its biggest routs in history after the athleisure maker warned that tariffs will dent its profit.

Lululemon Athletica shares slid after hours on Thursday, after the athleisure-wear maker cut its full-year profit outlook and offered a second-quarter forecast that came up short of Wall Street’s expectations.

Shares of Lululemon Athletica sank 20% Friday after the apparel maker's second-quarter outlook came in below estimates, and the company also cut its full-year profit forecast.