The 361 Degrees Flame 4 Series is a specialized line of carbon-plated running shoes designed for marathon racing and high-intensity training. Released as the 2025/2026 successor to the Flame 3, the series features three distinct models — the Flame 4, Flame 4 MIX, and Flame 4 ET — each tailored to different performance needs.

Performance & Technology

The series introduces the QU!KFLOAT system, integrating several proprietary 361 Degrees technologies for a more reactive and stable ride:

  • Midsole: Qu!kFLAMECQT supercritical nitrogen foam for a soft yet bouncy feel with high energy return.
  • Propulsion: Qu!kBONE DYNAM!C carbon-fiber plate (glass fiber in the ET) for rolling propulsion and torsional stability.
  • Upper: C!LK (Carbon Silk) mesh for extreme breathability, paired with the MORPHIT lacing system for secure midfoot lockdown.
  • Stack Height: 38mm heel / 32mm forefoot with a 6mm drop — a more cushioned profile than the Flame 3.

Model Comparison

  • Flame 4 — Full-length carbon fiber plate | ~210g (US 8.5) | Firm, aggressive, responsive | Best for: Marathon Racing
  • Flame 4 MIX (CQT) — Carbon fiber plate | ~254g (US 8.5) | Soft, bouncy, forgiving | Best for: Speed Training / Daily
  • Flame 4 ET — 3D curved glass fiber plate | Lightweight performance | Stable, natural transitions | Best for: Mass Runners / Road & Track
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