Shoe details from Specialized below: 

Inspired by the legendary European sport of randonneuring, the Audax shoe has been developed specifically for long rides spent chasing far horizons. Featuring proven Body Geometry fit with a spacious toe box, Boa® closure, and a FACT carbon outsole, the Audax combines comfort, adjustability and connection in a carefully crafted and timeless shoe. 

Body Geometry sole and footbed are ergonomically designed and scientifically tested to boost power, increase efficiency, and reduce chance of injury by optimizing hip, knee, and foot alignment. FACT Powerline™ carbon/composite sole for light, stiff power transfer: Stiffness Index 10.0.Overstrap with Boa® S2-Snap dial for easy adjustment, backed by the Boa® Lifetime Guarantee. Classic low profile heel reduces Achilles pressure for comfortable ankle motion. Replaceable heel tread. Three-bolt cleat pattern fits all major road pedals.