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Insole: 5 mm Contour Footbed
Midsole: Dual Layer EVA / A-Bound with StoneGuard
Outsole: DuraTread Rubber with TrailClaw
Upper: eVent Fabrics
Cushion: Moderate
The Lone Peak 4 Mid RSM is made to face the elements. As part of the Altra All-Weather Series (AWS) the RSM (rain, snow, mud) Lone Peak Mid features a brand new eVent upper, which offers 100% waterproof technology and leading breathability providing maximum comfort and protection in the widest range of conditions. This new fabric material is also lighter and more durable than our previous version. The 4-point GaiterTrap and fresh mountain design complete the upper, while the updated, multi-directional lugs on the outsole bring you optimum grip.