The Superior 4.5 features:

• Balanced cushioning paces your heel and forefoot the same distance from the ground to encourage proper, low-impact form throughout your run.
• Footshape™ toe box allows your toes to relax and spread out naturally for more comfort and stability.
• The Fit4Her™ technology means we customize every women's shoe to the unique anatomy of the female foot.
• Innerflex™ grid-like grooves in the midsole allow your foot to flex while being lighter, for more speed and better performance
• GAITERTRAP™Hook-and-loop tab allows strapless gaiter attachment that prevents debris from building up beneath the shoe.
• TRAILCLAW™Canted lugs positioned strategically beneath the metatarsals to provide traction at toe off.
• MAXTRAC™A perfect combination of grip, traction and durability that will eat up gnarly terrain like a boss.
• QUANTICQuantic™ was inspired by a desire to combine the plush feel of Altra EGO™ with a lightweight ride, it cushions every step and floats over any surface.
• Seamless wrap-around engineered knit upper
• Insole: 6 mm Contour Footbed with removable StoneGuard™