Great grip and a lightweight construction make the Altra Women's Superior 2. 0 Trail Running Shoe versatile enough for light hiking and long-distance trail running. The Zero Drop platform places your heel and forefoot at the same distance for a natural stride. The Superior's A-Bound midsole returns energy with every step, propelling you forward with less effort, and provides comfortable cushioning while keeping things minimal and low-profile. InnerFlex grooves in the sole and midsole keep things flexible and help you grip uneven terrain. Altra also added a 5mm Contour footbed for lightweight support, and a removable StoneGuard insole for lightweight protection when you're cruising over rocky and rugged terrain.The Superior 2. 0 also features Altra's TrailClaw sole, which shapes sticky rubber to match your foot's bones and tendons for a natural flex and killer grip. A FootShape toe box lets your toes spread out naturally to ensure stability on rugged terrain. Altra built the Superior 2. 0 with a quick-drying and durable Air Mesh upper to ventilate and keep your foot cool, and included its Gaiter Trap technology to accommodate debris-blocking gaiters without having to wrap them around the shoe's sole.