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 outso
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: Seamless wrap-around engineered knit
Weight: 7.9 oz. / 224 g
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.
Hook-and-loop tab allows strapless gaiter attachment that prevents debris from building up beneath the shoe.
Canted lugs positioned strategically beneath the metatarsals to provide traction at toe off.
New midsole cushioning with a perfect blend of plush, responsive cushion and a lightweight ride.