Compact aero for road racing. Short enough not to punish you when you look down, fast enough to matter.
The Sigma-II is the road-racing answer to the Omega: a compact aero profile that keeps working when your head drops on a climb or in a sprint. Full-length tail helmets are faster in a wind tunnel and slower on a rider who moves — the Sigma-II is shaped for the second kind of racing, which is the kind that exists.
The essentials
Compact aero road helmet
Profile stays clean with the head down
Engineered by Cádomotus, twenty-five years of aero across two sports
Dutch engineering
Size it with us
Helmets cannot be returned once the packaging is opened, for hygiene reasons — so get the size right the first time. Ask us before ordering; a fitting fee is credited against your purchase.
