Skechers USA is suing Sears Holding Corporation for selling footwear it claims infringes on a number of product lines including the Twinkle Toes and Z-Strap brands and the Shape-ups toning range.

Sears is selling the products at its Sears and KMart’s retail stores and websites under the TheraShoe, Melrose Avenue, Paris Blues and Athletech labels, the lawsuit claims.

“We have obtained more than 150 patents and trademarks on these lines, and have built them into brand names universally recognised around the world as synonymous with Skechers,” explains the footwear firm’s general counsel Philip Paccione.

“While we value our relationship with Sears, their actions are causing us tremendous damage, and we simply cannot let any company, let alone a company the size of Sears, infringe on our most valuable intellectual property.”