Sigma-II Compact Aerodynamic Cycling Helmet Size:M/L | 58-62cm The Sigma-II features a revolutionary

The Sigma-II features a revolutionary magnetic lens attachment system

and minimizes chafing

With class-leading aerodynamics

Replacement Horizontal dropout kit for QR Rim bikes

Equipped with both DWR finish & naturally hydrophobic allowing you to stay warm even if caught in the rain or on the slopes

Sigma-II Compact Aerodynamic Cycling Helmet Size:M/L | 58-62cm The Sigma-II features a revolutionaryExperience unparalleled performance with our new compact and lightweight cycling helmet!. The Sigma II features a revolutionary magnetic lens attachment system, enabling quick and effortless attachment and removal of a wrap around eye shield. This innovative design allows for easy storage of the lens in the "flipped up" position, making it ideal for fast transitions in triathlons.. Hidden magnetic receivers on the helmet are fully compatible with SKY