EcoDim tummy toning knickers designed to tone the tum, featuring lace on the sides, microfibre at the back, and a cotton-lined gusset. These knickers are made from a microfibre fabric that is invisible under your clothing, offering control. Product details: Knickers. Fabric: microfibre. Invisible under your clothing. Control. Fabric content and care advice: 82% polyamide, 18% elastane. Please refer to the care instructions on the product label. OEKO-TEX® Standard 100. Standard 100 certification by OEKO-TEX® tests textile products for harmful substances via an independent, international label.