- Size: 43-44 • Polyurethane elasticity improves shock absorption and prevents injuries. • Absorb sweat and odor. • Non-slip base improves balance and relieves stress on the feet. • Curved heel provides stability and protection. • Soft, non-slip, breathable, and absorbent insole. • Gel base provides cushioning and flexibility. • Ideal for exercise or daily use, they fit all types of shoes. • Measure and trim the insole length if necessary. • Frequently air out your insoles when not in use.