Altra Superior 4 Running Trail Shoes Sneakers Size 8 with Stone Guard Ideal Uses: Trail running, trail racing Cushioning: Low Stack Height: 21mm Weight: 7.9 oz. / 274 g Designed to Improve: Natural Foot Positioning, Toe Splay, Comfort, Stability Platform: Fully Cushioned Zero Drop platform and FootShape toe box Description If you already loved the Superior, you are in for a treat. The Superior 4 is even lighter, grippier and sleeker. It features a knit, wrap-around style upper to more security, plush yet resilient Altra Quantic midsole and sticky MaxTrac rubber outsole. The rounded heel style and updated lug pattern tops off this light weight trail crusher.