| Drainage Holes : Allows water and sweat to escape easily. |
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| Dual Density EVA Insole : High-performance builted for increased arch support. |
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| Energy Cell : Located in the forefoot and is a responsive cushioning device that is designed for increased energy return. |
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| Energy Foam : Cushions the foot upon impact and then returns energy back to the runner for plush all day cushioning. |
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| EVA : Industry standard thermoplastic designed to provide durable cushioning. |
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| EVA Top Sheet : Sandwiched between the Syncro Stability Frame and the upper. It is engineered to provide underfoot cushion. |
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| Graduated Guidance System : Engineered with graduated foam density to guides the foot for a efficient heel to toe-off. |
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| Ortholite sockliner : Under foot insert for amazing step-in comfort and long-lasting cushioning every time. |
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| SkyDex® : Cushioning. Protection. Comfort : The Skydex gives your foot a serious cushion on heel strike, every time, for long mileage. Integrated with the SyncroFrame Guidance System, it greatly increases shock absorption using a material that is unmatched in impact protection performance. |
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| SkyDex® Crash Pad : Composed of thermoplastic polyurethane molded into a twin hemispherical pattern engineered to absorb shock from heelstrike. |
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| SkyDex® Forefoot : Forefoot cushioning system made up of thermoplastic polyurethane molded into a twin hemispherical pattern designed for toe off propulsion. |
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| Syncro Frame : Guidance System : Stability. Energy return. Durability : Programmed guidance system offers a biomechanically tuned ride. Provides midsole structure which results in a longer midsole life. The forefoot thrust plate combined with high rebound foam provides great efficiency and energy return. |
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| Syncro Guide : Support Guidance System : Breathable, seamless upper with integrated, reflective webbing support. Super-soft, non-stretch microfiber suede lining holds the foot securely. Full foot "Syncro S" stability frame provides solid guidance and support for light to significant pronation needs. Skydex forefoot and heel components provide exceptional shock absorption and energy return, giving super cushioning and a lively feel. |
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| Syncro Stability Frame : Is positioned from the medial heel to midfoot and is a thermoplastic device intended to reduce mild pronation. |
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| Syncro Stability Frame Half-length : A low profile thermoplastic device intended to reduce mild-pronation which is located from the heel to midfoot. |
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| TPU Bridge : Located at the bottom of the midfoot and is a thermoplastic unit intended to maintain forefoot and rearfoot torsional integrity. |
