Spring/Summer 2017. Dynamic Offset: 4mm at initial contact to 7.5mm at mid-stance Seamless Upper delivers improved mid-foot fit and the Anatomical Forefoot Shape allows for natural forefoot splay and foot swelling Bi-lateral mid-foot posts are trail-tuned to keep feet on top of the midsole platforms in technical terrain. ESS forefoot rock plate protects feet against stone bruising and rock push-through. Heel Stack Height: 27.5mm Aggressive, multi-directional carbon rubber outsole offers superb traction and abrasion resistance.