Key Features Double-layer Helion™ HF hyperfoam midsole for lightweight, max-energy return. Combined with a cushioned heel, landings and push-offs feel energized and comfortable Carbon-infused Speedboard® delivers powerful propulsion with each stride. The glass fiber-infused Speedboard® enhances efficiency and confidence. It's geometry is engineered to support all types of running styles. Aggressive rocker geometry promotes smooth, rolling transitions Engineered mesh upper offers breathable, race-ready lockdown. It cleverly molds and adjusts to your foot's movements over long distances and time. Feels like nothing, so you can focus on the race. Rubber outsole reinforcements in high-abrasion zones for grip and durability High-stack platform ensures long-distance comfort with speed Designed specifically for marathons and long-distance racing. This elite-level super shoe features re-engineered components and geometries that provide marathon runners of all levels with soft, responsive cushioning, absorbing impact, maximizing efficiency, and boosting confidence to reach their goals. Ideal for everyday runners with marathon target times of about four hours or more. Specifications Weight: Approx. 8.5 oz (Men’s US 9) / 7.0 oz (Women’s US 8) Heel-to-Toe Drop: 8mm Support Type: Neutral Cushion Level: Responsive, max-stack race cushioning Best For: Marathon racing, tempo runs, competitive road races Ride Feel: Snappy, energetic, and efficient Materials Upper: Engineered mesh made from recycled polyester (lightweight & breathable) Midsole: Dual-density Helion™ HF foam with carbon-infused Speedboard® Outsole: Durable rubber in high-impact zones for traction and stability Sustainability: Contains recycled content in the upper materials
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