New Balance FuelCell SuperComp Pacer Running Shoes Designed for 5k to half-marathon distances, the FuelCell SuperComp Pacer from New Balance contains Energy Arc technology, a carbon fibre plate and a double-layer springy FuelCell midsole to help propel your strides forward. These racing flats also feature a single-layer engineered mesh upper for breathability and a lightweight feel. The sleek design offers runners a lower stack height racing solution and a snappy ground feel. Synthetic Engineered Mesh Upper Featuring a synthetic engineered mesh upper, the FuelCell SuperComp Pacer delivers an extremely breathable and lightweight feel. This breathable design ensures that your feet remain cool and comfortable during those longer runs. The single-layer engineered mesh allows the warm build-up to escape the shoe and cool air to circulate so that you can stay focused on reaching your goals without the worry of discomfort. A sleek tongue construction and thinner collar furth