Imported Rubber sole Whether you are running for miles or hitting the trails, the Altra Olympus 5 Sneakers deliver enhanced comfort, flexibility, and breathability that your feet desire. Breathable engineered mesh and synthetic upper. Lace-up closure for a secure fit. Textile lining. Removable cushioned insole. Whether you are running for miles or hitting the trails, the Altra Olympus 5 Sneakers deliver enhanced comfort, flexibility, and breathability that your feet desire. Breathable engineered mesh and synthetic upper. Lace-up closure for a secure fit. Textile lining. Removable cushioned insole. Altra EGO MAX midsole compound is responsive, yet soft for increased energy return. Balanced cushioning platform positions heel and forefoot at an equal distance from the ground. FootShape toe box allows your toes to relax and spread naturally for more comfort and stability during uphill climbs and downhill descents. TrailClaw canted lugs positioned strategically beneath the metatarsals to provide traction at the toe off. GAITERTRAP hook-and-loop tab allows strapless gaiter attachment that prevents debris build-up beneath the shoe. Vibram MegaGrip high-performance sticky rubber outsole provides unrivaled grip on wet and dry surfaces, rugged longevity, enhanced ground support.