Superior 5 from Altra is a lightweight, lightning-fast shoe you can trust on any trail. This certified speed-seeker is trail-ready with a MaxTrac™ sticky rubber outsole, the lightweight and responsive Quantic™ midsole, and the improved upper that’s more locked-in and durable. Throw in improved breathability, better drainage, and a removable StoneGuard™, and the Superior 4.5 is ready to blaze trail like never before. Women's sizes.

• Insole: 6 mm Contour Footbed with removable StoneGuard™
  
• Midsole: Quantic™ with InnerFlex™
• Outsole: MaxTrac™ Rubber with TrailClaw™
• Cushion: Low
• Stack Height: 21 mm
• Upper: Seamless wrap-around engineered knit