Designed for 5k to half-marathon distances, our FuelCell SuperComp Pacer contains Energy Arc technology, a carbon fiber 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 for breathability and a lightweight feel.Textile lining and insole. FuelCell foam delivers a propulsive feel to help drive you forward.Sleek tongue construction and a thinner collar provides maximum heel lockdown.Carbon fiber plate.Adjustable lace closure for customized fit.Overall low-stack design provides snappy ground feel for a faster feeling.Synthetic sole. Imported.Product measurements were taken using size 9, width D - Medium. Please note that measurements may vary by size.Measurements: Weight: 3 oz SKU 9601529