Worn one time. Great running shoes! DESCRIPTION: “Experience a new high in a shoe designed to deliver effortless, efficient strides for euphoric miles. It’s the first Altra shoe with Altra EGO™ P35 midsole foam, designed for lightweight efficiency, performance, and comfort. An updated heel fit and re-designed upper with engineered mesh improves breathability. With a low 4mm drop and rocker shape geometry, it’s a shoe made to help you experience an efficient toe-off and a smooth, quick roll through every stride. It’s got a roomy toe box and secure midfoot, so you have plenty of room to help your toes move more freely. That runner’s high you’re always chasing? It’s right at your fingertips in the Experience Flow 2.”