Footwear brand Skechers has filed a lawsuit against LL Bean in a New York District Court, accusing the latter of patent infringement. LL Bean’s Freeport shoe allegedly infringes two patented designs for the “heel cup” element of Skechers shoes.

“Only after Skechers incurred the substantial risk and monumental expense of developing and promoting its shoes with these heel cup designs, and established that they had broad appeal, did LL Bean enter the market with its infringing shoe,” Skechers said.

The Freeport shoes currently retail for $99 on LL Bean’s website.

Not unlike Adidas, Skechers, the world’s third largest shoe company, has something of a history when it comes to aggressively protecting its intellectual property rights. Previous lawsuits have been filed against Steve Madden , Reebok and Fila accusing the brands of infringing patents held by Sketchers.

The case is Skechers USA Inc et al v LL Bean Inc, U.S. District Court, Southern District of New York, No. 24-05336.