Earth - Pacific (White Butter Calf) - Women's: Comfort and performance with KALSO Negative Heel Technology, promoting natural posture and stride. Leather uppers with ventilation perfs, and absorbent lining. A full heel to toe layer of Gelron 2000 prevents impact from reaching the heel, leg or lower back. Removable sockliner. Carbon fiber shank for superior support, torsion control, and lateral stability. Multi-density mid-sole and latex rubber bottom provide optimal flexibility and cushioning. Anatomic, naturally shaped footbed is removable.