New Balance FuelCell V3 - Blue Sky First, blue Sky is the color of a clear race morning — the specific light that experienced marathoners know means the weather is on their side. The New Balance FuelCell V3 - Blue Sky captures that optimism in nitrogen-infused FuelCell foam and full-length carbon. For runners who show up ready. Moreover, this is the FuelCell for New Balance runners who train through all conditions and race when the sky is on their side. Nitrogen-infused PEBA for the perfect race morning. FuelCell (Nitrogen-Infused) + Carbon Plate: New Balance Racing Technology Additionally, fuelCell foam is nitrogen-infused — a process that creates a lighter, more responsive foam cell structure than standard EVA. The result is a midsole that returns energy with a snap that builds across marathon distance. The full-length carbon fiber plate amplifies that return, creating a propulsion system that rewards runners who push consistently from start to finish. Engineered mesh upper: lightweight race fit. Rubber outsole. 215 g. 6 mm drop. 38 mm heel stack. New Balance's most technically advanced racing platform. For Who? For New Balance runners targeting marathon and half-marathon PRs. Best for athletes with race-shoe experience who know their goal pace. Technical Data Weight: 215 g (US M 9.5) Drop: 6 mm Stack: 38 mm heel / 32 mm forefoot Foam: FuelCell (nitrogen-infused) Plate: Full-length carbon fiber Upper: Engineered mesh — lightweight race fit Outsole: Rubber — full length Surface: Road Usage: Racing — marathon, half-marathon