An update that delivers lightweight traction and a high-performance fit are ASICS Hyper XC Spikes. You'll benefit froma supportive, contoured arch and a design that creates reliable control. Perfect for intermediate-level athletes. They come with 9mm spikes and a wrench. Upper: Constructed with lightweight, breathable mesh. Flat laces reduce irritation. Synthetic overlays provide lightweight support.Midsole: Compression molded EVA midsole provides responsive cushioning.Outsole: Sole unit featuresa supportive, contoured arch. Trusstic System® reduces the weight of the sole unit while retaining the structural integrity. Solid rubber outsole. 5-pin configuration.