The i-Run team says
Technologies
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Meta-Rocker
The Meta-Rocker midsole geometry, specifically designed with a low heel-to-toe drop and a sculpted outsole radius at the heel and toes, creates a unique pivot point effect that promotes a guided gait cycle.
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Curved Sole Profile Midfoot
The midsole's curved profile under the metas, designed with a transition zone placed behind the metatarsal heads. Promotes a smoother stride and ensures a faster transition at the meta.
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Profly
This cushioning provides more flexibility at the heel to absorb shocks and more firmness at the forefoot for propulsion and energy return.