New Balance FuelCell Echo Women's Running Shoes Silver Mink/Steel : Add a splash of style on your next run in the snazzy New Balance FuelCell Echo. This neutral road running shoe is lightweight, fast, and features bold colors and eye-catching embroidered details. For runners who want a shoe that can handle the road, treadmill, and every workout in between, the New Balance FuelCell Echo is a stylish alternative. Shoe Technology Upper: Engineered knit bootie construction offers a snug, supportive fit. Padded heel collar increases comfort. External TPU heel counter creates a locked-in fit. Midsole: New and improved full-length FuelCell midsole provides responsive propulsion and consistent energy return. Outsole: Full-length rippled rubber outsole offers durability and traction when you need it most.