Altra's 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 Altra's sticky MaxTrac rubber.
PRODUCT FEATURES:
• Insole: 5 mm Contour Footbed
• FootShape™ Toe Box with Fully Cushioned Zero Drop PlatformTM
• 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
• FOOTSHAPE™ TOE BOX Allows your toes to relax and spread out naturally for more comfort and stability in uphill climbs and downhill descents
• ZERO DROP™ 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
