• Fit Survey:

    44% True to size
    88% Felt true to width
    67% Moderate arch support

    Item Information

    • SKU: #8977652
    • View the size chart
    • Get the most out of your fitness routine with the re-engineered Instinct 4.5 athletic shoes from Altra®.
    • Predecessor: Instinct 4.
    • Support Type: Neutral.
    • Cushioning: Moderate.
    • Surface: Road.
    • Great for running, fitness, walking, cross training.
    • 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.
    • Built for the neutral runner seeking moderate underfoot cushioning.
    • Ideal for running, ultramarathons, long distance walking, and cross training.
    • Designed to improve running form, toe splay, stability, and power.
    • Engineered mesh upper for superior breathability.
    • 3D printed pinstripes.
    • Lace-up closure.
    • FootShape™ toe box allows the toes to relax and spread naturally for optimal comfort, speed, and stability.
    • Lightly padded tongue and collar.
    • Breathable DriLex™ lining offers a great in-shoe feel.
    • 6mm contoured footbed.
    • Natural Ride System blends outsole and midsole componentry, along with anatomical design, the Zero Drop platform and foot-shaped last to promote a more natural stride.
    • Zero Drop construction places the heel and forefoot at the same distance from the ground to encourage natural, low-impact running form.
    • INNERFLEX™ grid-like midsole flex grooves add flexibility right where it's needed to promote speed and enhance performance.
    • Ultralightweight Abound EVA midsole foam and a unique energy-returning compound work together to protect feet upon impact, and add sprint to each step.
    • Foot Pod Technology™ consists of a rubber outsole and midsole layout that maps the foot's bones and tendons for more natural flexibility.
    • Total Stack Height (total thickness of midsole and outsole underfoot): 25 mm
    • Imported.
    • Product measurements were taken using size 11.5, width D - Medium. Please note that measurements may vary by size.
    • Weight of footwear is based on a single item, not a pair.
    • Measurements:
      • Weight: 12 oz
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