Our new performance bike helmet is so compact, light, and comfortable that you’ll forget you’re wearing it!
The Sigma-II features our race-proven magnetic click system, allowing for quick attachment and removal of a visor. Our system makes it easy to store the lens in the "flipped-up" position – perfect for fast swim-to-bike transitions in triathlon.

The new 'hidden' magnets in the helmet are fully compatible with SKY or A2 lenses, which we developed for the Omega and Alpha Aero helmets. The integrated visor is an optional accessory, available separately for athletes who don’t already have an Alpha-2 or Omega helmet with a visor.

3 reasons to wear a Cadomotus Sigma-II helmet:

The Sigma-II follows the latest helmet design trends; with a robust and compact shape and aerodynamic geometry.
The Sigma-II keeps your head cool thanks to the extra-large ventilation channels, even in the highest temperatures.
With the Sigma-II, you can use an aerodynamic visor, perfect for triathlon or cyclists who wear glasses.
Our SKY lenses fit the Sigma-II helmets. Higher-quality visors, like the Cadomotus SKY lenses, taper and correct the prism effect for more accurate vision.

Race-approved by UCI cycling, World Skate (FIRS), and ITU triathlon.