EcoDim tummy toning knickers. Designed to tone the tum. Lace on the sides. Microfibre at the back. Cotton-lined gusset. These knickers are made from a microfibre fabric and are invisible under your clothing for a smooth silhouette. They offer control to help tone your tummy. Fabric content: 82% polyamide, 18% elastane. Please refer to the care instructions on the product label. This product is OEKO-TEX® Standard 100 certified, meaning it has been tested for harmful substances by an independent, international label.