Features grippy MaxTracâ„¢ outsole and upgraded Altra EGOâ„¢ MAX midsole. Designed for trail, any ground, and terrain. Midsole: Altra EGOâ„¢ MAX. Outsole: MaxTracâ„¢. Cushion: High. Stack Height: 29 mm. Weight: 10.9 oz/ 308 g.