Manmade,MeshImportedSurface: Road. Differential: 6mm. Heel/Toe: 18mm/12mm. Breathable mesh and synthetic upper. Constructed with a last that allows for more room in the toe box to keep the runner safe and supported even while trekking downhill. Lace-up closure. Padded collar for added comfort. Comfortable fabric lining offers a great in-shoe feel. Cushioned textile footbed for added comfort and support. SpEVA? midsole improves bounceback and decreases midsole breakdown. Durable trail-specific outsole proviStay in step from the road to the rest of your day with the comfortable hybrid style of the ASICS? Alpine XT running shoe.Predecessor: N/A.Support Type: Underpronation to Neutral.Cushioning: Lightweight, flexible response.