Altra FootwearAltra Footwear - Superior 3

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Tricky trails are no match for the rugged design of the Altra Superior 3 trail-running shoe! ; Predecessor: Superior 2. ; Support Type: Neutral. ; Cushioning: Lightweight, flexible response. ; Surface: Trail. ; Differential: 0 mm. ; Altra Zero Drop recommends that those new to natural running and zero-drop footwear transition slowly by wearing these on shorter runs and gradually building up to regular mileage. ; Ideal for trail running, off-road racing, hiking, and backpacking. ; Designed to help improve natural running form, walking form, and toe splay. ; Quick-drying air mesh and thin synthetic upper materials. ; Lace-up closure. ; Foot-shaped toe box allows natural foot flex and toe splaying. ; GaiterTrap hook-and-loop tab allows for gaiter attachment. ; Heel pull loop. ; Padded tongue and collar. ; Breathable fabric lining offers a great in-shoe feel. ; Removable 5 mm Contoured footbed. ; Fully cushioned Zero Drop technology promotes a more natural foot strike for a more efficient stride. ; EVA and A-Bound blended midsole with InnerFlex provides impact protection and energy return with each stride. ; DuraTread and TrailClaw outsole features canted lugs beneath the metatarsals for ultimate gripping in the gnarliest of terrain. ; Stack Height: 21 mm. ; Last: PFS2-M/PFS-W. ; Imported. ; Weight of footwear is based on a single item, not a pair. ; Proposition 65 WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.