18 adaptive Cloud elements and Helion™ superfoam combined with the re-engineered Speedboard® to turn impact into acceleration. The curved heel unit means better hold, durability and comfort. Strategic taping and a new lacing configuration offers sure-footed freedom and support for high-speed goals. The Swiss-engineered mesh upper is primed for race pace. Lightweight and reinforced to support tired feet, with zoned ventilation to let air flow through. An elastic strap keeps laces out of the way, and advanced traction pattern offers superior grip on wet roads. Specs Fit: True to size Activity: Running Use: Road running / Training Cushioning: Direct Best for: Fast training, marathon, 10K, racing