Stretch knit upper allows for breathability. A finished jersey stitch in the topline area allows ease of entry. Tight knitting in the forefoot area allows for ultimate medial / lateral stability. Leather detail at the heel. Toe medallion consists of 1mm pointelle stitches to optimize airflow in the toe box area. Combination open and closed pointelle in the mid-foot area creates a flow of heat dispersion from the foot. Fully padded sock lining for ultimate comfort. EVA midsole with rubber outsole. Grand.OS technology.