The trail won’t know what hit it with the Olympus 4 from Altra. This new model has a new look and everything you need for a new trail adventure. The breathable, durable engineered mesh upper is complete with a premium tongue for a tailored, locked-in feel. The Vibram® MegaGrip™ outsole excels in both wet and dry conditions while the high-performance InnerFlex™ midsole offers comfortable flexibility. Strap your gaiters into the GaiterTrap™ and head for the trails with the max cushion, max comfort, and max performance Olympus 4.