AmazonBoost is the most adaptable padding we've ever had: the more force you expend, the more power you get back Stretch mesh upper with distorted "sturgeon" pattern Sock-like construction Molded EVA midsole plugs; Molded heel Rubber outsole
Boost is the most adaptable padding we've ever had: the more force you expend, the more power you get back Stretch mesh upper with distorted "sturgeon" pattern Sock-like construction Molded EVA midsole plugs; Molded heel Rubber outsole