Like new. Strengthen your strides with the New Balance FuelCell SuperComp Pacer. Designed for 5k to half-marathon distances, these women's racing flats include Energy Arc and a carbon fiber plate sandwiched between springy FuelCell midsole technology to help drive you forward. The single-layer engineered mesh upper provides breathability and a lightweight feel while the sleek design and lower stack height offer a snappier, fast-on-your-feet ground feel.