I’ve only worn these once for a 6 mile test run. They are great shoes and would love to keep them but the right shoe is just slightly too tight on my foot. Product Details: - Flying NB branding connects to the New Balance Race Day collection - Energy Arc pairs advanced carbon fiber plate geometry with strategically shaped and placed midsole voids, designed to increase stored energy to deliver a high amount of total energy returned - Engineered knit upper with built-in tongue - FuelCell foam delivers a propulsive feel to help drive you forward