361° Flame Double "Nebula" 672642221-26 - Marathon Running Shoe Unisex Photon Gray
361° Flame Double “Nebula” 672642221-26 — Marathon Running Shoe
The 361° Flame Double “Nebula” is unlike any other marathon shoe on the market. Instead of committing to a single purpose, it ships with a patented dual modular insert system that lets you physically swap between a plush daily trainer and a stiff, carbon-plated race weapon — using the same pair of shoes. Lace them up soft on Monday, snap in the carbon plate on race morning. One shoe. Two performance identities.
✅ 100% Authentic — Direct from 361°: Every pair is 100% authentic, sourced and verified directly from 361°. No fakes, no replicas.
🚚 Free Shipping: Free shipping on every order.
💬 Dedicated Customer Support: Expert support available before and after your purchase.
🔄 The Dual Realm Concept: How It Works
The standard sock liner is replaced entirely by a thick, structural drop-in insert system. The shoe ships with two distinct pairs:
- Training Insert (Unplated) — Pure 361° super foam with standard arch support and zero carbon plate. Delivers a flexible, forgiving, high-cushion ride ideal for daily training, easy miles, and recovery runs.
- Racing Insert (Carbon-Plated) — The same high-energy foam contour, but with a full-length QUIKBONE carbon fiber plate fused directly to the base. Slide it in and the shoe instantly transforms into an aggressive, spring-loaded marathon racing flat.
⚙️ Core Specifications & Features
- QUIKFLAME Cushioning System — The primary midsole chassis and both drop-in inserts use 361°’s nylon-based elastomer super foam (NL FORM). Exceptional shock absorption under the heel, maximum energy return at toe-off.
- Ultra-Thin Semi-Translucent Mesh Upper — An incredibly lightweight, breathable mesh upper accommodates the robust drop-in inserts without adding bulk. Zero water retention keeps feet cool and dry over long road stretches.
- RPU High-Grip Outsole — Heavy-duty texturized RPU (Reactive Polyurethane) rubber delivers exceptional non-slip grip on wet pavement, tracks, and sharp concrete turns.
- Aesthetics — The “Nebula” colorway features a deep Photon Gray profile — a cosmic, atmospheric aesthetic evoking the vastness of space and the drama of interstellar clouds.
📏 Sizing & Fit
- Performance race fit — Secure zero-slip lockdown upper. Because the modular inserts are relatively thick, vertical volume in the toe box can feel snug initially.
- True to size for normal to narrow feet. Runners with wider feet or those wearing thick compression socks should size up half a size to avoid toe crowding against the performance mesh.
- Unisex sizing — EU 36 through EU 46.