Powerstep SlenderFit Women's Fashion Orthotic High Heel Insole Anti-microbial Imported Synthetic sole Unique S Shaped Shell: The design of the Slender Fit cradles your heel and provides full foot arch support. Built-in VCT (Variable Cushioning Technology): Metatarsal cushioning gives you a targeted, controlled cushion with a soft, supportive feel. Ultra-Thin Tapered Design: The Slender Fit is made to conform to most shoe styles and the natural grip on the underside holds it firmly in place. Anti-Microbial Top Fabric: Heat and friction are reduced, leaving feet more comfortable and healthy. No Trimming Necessary: Move the Slender Fit from shoe to shoe easily to get cushioning and support with every outfit.