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The Altra Lone Peak 4 RSM is ready for any weather you choose to run through. The upper is made of eVent™. eVent™ offers market leading breathability, delivering maximum comfort and protection in the widest range of conditions. In addition, the Lone Peak 4 RSM features a reinforced toe cap, modernized mountain design on the upper and 4-Point GaiterTrap™ technology. The updated gnarly Duratread™, multi-directional outsole features accentuated TrailClaw™ for optimum grip and traction where you need it most.