Combining Topo´s bounciest foam with a propulsive plate, the Zephyr is a serious contender in the realm of highly cushioned speed demons. By encapsulating a super springy foam and a propulsive plate inside a firmer EVA foam, this shoe is able to offer race day responsiveness with the durability of a daily trainer. Paired with a thin mesh upper and racing tongue, the Zephyr has all the ingredients for running fast. If you like having plenty of room for your toes, grab a pair of Topo Athletic Zephyr´s for your faster days.Features:Midsole:- Lightweight EVA frame houses the plate and Zip Foam Core while providing durable stability.- Zip Foam Core adds plush responsiveness to the shoe.- Plastic Plate in the midfoot aids in stability and propulsion.Outsole:- Rubber Outsole strategically placed in the forefoot and heel for added durability and traction.Upper:- Open Mesh is thin, lightweight, and breathable. - Printed Upper Pattern adds durability and support.- Anatomical Toe Box provides an extra-wide toe box shape to promote a more natural toe splay.