Px Foam™ is an ultra-lightweight midsole material that offers an exceptionally high amount of energy return while providing shock-resistance and flexibility. A single, natural foaming agent is used in making this green innovation without adding any chemical cross-linking agents. The process is non-toxic and in addition, all raw and finished materials are completely reusable. The innovative foam has an extremely low density making it up to 20% lighter than traditional EVA. The reduced weight combined with explosive rebound make Px Foam™ perfect for every run.