The Spire is our flagship neutral running shoe and already delivers on the promise of great comfort. When we started working on the creation of the 4th edition we prioritized ‚more comfort‘. Actually, we set a goal to deliver more than that, we wanted ultimate comfort. We formulated a new EVA midsole material QU!CKSPRING+ that allows the shoe to give more cushioning and responsiveness next to the QU!KFOAM layer that already delivers a high level of comfort. We worked together with Ortholite to create our own insole material mix, resulting in a higher level of breathability and better moisture management directly under the foot. Then we redeveloped the upper construction with more breathability and flexibility through improved mesh materials and we reconstructed the heel collar to create a perfect hold and fit.  

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