Lone Peak 7 is a legendary trail runner with a lightweight upper, MaxTrac outsole, and EGO midsole. Footshape toe box: Allows your toes to relax and spread out naturally for more comfort and stability in uphill climbs and downhill descents Balanced cushioning: Altra's Balanced Cushioning platform positions your heel and forefoot at an equal distance from the ground, encouraging better alignment, better form, and a low impact landing Altra Ego: Dual-Nature midsole compound with a responsive, yet soft feel for increased energy return Maxtrac: Dual-Nature midsole compound with a responsive, yet soft feel for increased energy return Technical Features Stack Height: 25 mm Cushion: Moderate Weight 261 g / shoe Materials Midsole: Altra EGO Outsole: MaxTrac Upper: Quick-Dry Air Mesh