Revolutionary TechLoom upper construction is seamlessly woven from performance textiles resulting in a true one-piece upper for an exceptional fit. Engineered into a single layer; support, breathability, flex and strength are all strategically designed and placed in key areas where each of these specific features are needed. Midsole/outsole compound developed for direct ground contact, enabling the use of less rubber on the outsole, significantly reducing the weight of the shoes. Propelium® is designed to maximize energy generation and provide superior comfort that will maintain midsole structural integrity longer than conventional EVA. Inspired by the shape of a feather, the outsole incorporates natural motion flex grooves that react to every movement. 100% Vegan, made with no animal products. The 8mm drop from the heel to the forefoot places your foot in a natural position for efficient running.