Ryka Women's Ultima Run 2 Running Shoe 100% Mesh and synthetic Rubber sole Empower yourself on every run with the peak performance and progressive design of the Ultimate Run from rka Combination upper of leather, air mesh, and high density foam for enhanced performance and breathability Removable molded Nitracel footbed with EVA strobel board for improved comfort Lightweight molded EVA midosle with Lateral Guidance Support Shank to make every stride an effortless one Skeletal sold rubber outsole with ergonomic touch points