The i-Run team says
Technologies
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OS Tendon
Allows for an optimal heel-to-toe transition for better running quality. This provides feedback or a spring effect during push-off. The tendon is positioned more along the inner part of the shoe.
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EnergyCell
Midsole providing better forefoot propulsion
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3D Air Mesh
Exceptionally flexible, the 3D mesh perfectly conforms to the shape of the body even in motion, without causing any skin or t-shirt abrasion. The wide mesh is highly breathable and comfortable. Ideal for lightweight and fitted trail backpacks.
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OS Muscle
Ultra-soft and ultra-cushioning interlayer foam that accelerates recovery.
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Contagrip MA
The Contagrip MA adapts to a multitude of surfaces. It offers an excellent balance between geometry and the rubber used to ensure high confidence on wet, dry, hard, or unstable terrain, while also providing prolonged durability.