A stable ride for off-road runners.

The trail won’t know what hit it with the new Altra women's Olympus 4. This update 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. As always, signature FootShape™ comfort gives your feet more space to sit naturally and is designed to address biological differences in men's and women's feet.

PRC's Take: The robust medial (arch-side) sidewall of the Olympus 4's midsole gives the shoe a distinct asymmetrical look, but more important, this feature coupled with the shoe's broad base delivers a stable ride for the trail runner who typically needs support to align feet, ankles and knees. We're positioning it as a stability shoe for the trails.