Altra's original trail shoe got some fresh new updates to make this version better than ever! First off, the upper is not only more breathable but more durable & secure, it features a static webbing cinch strap at the midfoot, a sandpaper textured toe cap, & enhanced drainage holes. The outsole got a complete makeover with decoupled Trail Claw™ & multi-directional, carved lugs for increased traction & reduced weight. & just in case all the new features didn't already have you stoked, the Stone Guard™ is completely new & now resembles the skeletal structure of a foot for dynamic flexibility & better performance.