Active wear company Lululemon Athletica is suing PVH's Calvin Klein and G-III Apparel Group over alleged trouser patent infringements.

The allegations centre on Calvin Klein trousers sold under the Performance brand, which Lululemon believes were manufactured and supplied by G-III apparel. It said the yoga pants were similar to its own patented Astro Pant style.

It is seeking a permanent injunction to prevent Calvin Klein from selling the trousers, as well as damages and costs.

In June, Lululemon recorded a 40.2% surge in first-quarter net profits to US$47m, but suggested same-store sales growth is set to slow. For the first-quarter, the company recorded 25% comparable store sales growth, but is forecasting full-year comparable store sales will increase in the low double-digit range.