A fusion of CloudTec® and Helion™ HF for our fastest race-day shoe. Get ready to outrun your echo. Weight: 215g Built with CloudTec® and Helion™ HF hyper foam Every element is engineered for performance Rocker-shaped carbon Speedboard® Impact protection and high energy return Ultralight and weighs only 188-215g* Approved by elite-level athletes Silicone inserts and cushioning where you need it Thin, breathable, complete with one-piece upper