1. Mid-cut TechLoom upper construction is seamlessly woven from performance textiles resulting in a true one-piece upper for an exceptional fit. 2. Articulated eye row allows foot to flex using minimal overlays to maintain a light weight.  3. External heel counter provides lockdown and support. 4. Midsole/outsole compound developed for direct ground contact, enabling the use of less rubber on the outsole, significantly reducing the weight of the shoes. 5. Propelium™ is designed to maximize energy generation and provide superior comfort that will maintain midsole structural integrity longer than conventional EVA. 6. Inspired by the shape of a feather, the outsole incorporates natural motion flex grooves that react to every movement.