Energy 2 Vibram sole platform with increased rubber content for added durabilityAdditional felt layer between the outsole and midsole contributes to a more supportive and durable chassisPU midsole with structured ribs provides a more supportive and progressive flex with less hinge than beforeRevised last with increased volume in the toe box gives a more refined and comfortable fitUpdated lace furniture with a broader range of fitRevised upper seam positioning for increased durabilityUpdated cuff design