The Superior 4 takes an already lightweight, fast trail shoe and makes it even lighter. The upper has been completely redesigned in a wrap-around style for added security and support; the midsole features Altra’s proprietary Quantic™ foam, while the outsole is now made of our sticky MaxTrac™ rubber. To top it off, the rounded heel and improved lug pattern is made to fly down the trail with ease and speed.

Benefits

• Footshape™ Toe Box: Allows your toes to relax and spread out naturally for more comfort and stability in uphill climbs and downhill descents,
• Balanced Cushioning™ Platform: Places your heel and forefoot the same distance from the ground to encourage proper, low-impact form throughout your trail run.
• 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.
• Quantic™: New midsole cushioning with a perfect blend of plush, responsive cushion and a lightweight ride.

Features

• Insole: 5 mm Contour Footbed
• FootShape™ Toe Box with Fully Cushioned Zero Drop Platform™
• Stack Height: 21 mm
• Midsole: Altra Quantic™
• Outsole: MaxTrac™ Rubber with TrailClaw™
• Upper: Seamless wrap-around engineered knit
• Insole: 6 mm Contour Footbed with removable StoneGuard™
• FootShape™ Toe Box with Fully Cushioned Zero Drop™ Platform
• Stack Height 21mm
• Midsole: Quantic ™ with InnerFlex™
• Outsole: MaxTrac™ with TrailClaw™
• Upper: Wrap-Around Knit
• Weight: 7.9 oz. / 224 g