Reebok Women's Absolutevibe Running Shoe Synthetic and mesh Rubber sole VibeTech Energy Foam Insert - Located in heel, to provide responsive and plush cushioning. IMEVA (injection-molded EVA foam) midsole - For exceptional lightweight cushioning and great energy return. Removeable Sockliner - A sockliner which can be removed to accommodate a medical orthotic. Forefoot Flex Grooves - Enhances flexibility for a more natural, efficient range of motion. Linear Mesh System - A breathable mesh materials provide soft flexibility and linear stability.