The only folding helmet in the world with ERT
Patented Protection
THE SCIENCE INSIDE YOUR WOOLF HELMET
Most helmets protect against straight-on impacts. But real-world crashes rarely happen that way. Angled impacts — the kind that send your brain rotating inside your skull — are the leading cause of serious cycling head injuries and concussions.
That's why Woolf is the only folding helmet in the world to integrate ERT™ (Energy Reduction Technology) — a patented soft polymer system engineered specifically to tackle the rotational forces that most helmets simply cannot address.
SOFTER IS SMARTER
Unlike rigid protective systems, ERT's soft polymer pads compress and deform on impact — absorbing and dispersing energy before it reaches your brain. And crucially, unlike most impact energy management materials thatdon't activate below a certain threshold, ERT responds atlower, more common impact levels— protecting you in everyday falls, not just catastrophic crashes.
Strategic Placement
ERT pads are positioned precisely based on each helmet's unique impact geometry — not spread across the entire structure. Targeted precision delivers better results than blanket coverage.
Low-Level Activation
Most energy management systems only kick in above a high impact threshold. ERT's soft polymer responds at lower impact levels — the kind of everyday knocks and falls that cause the majority of cycling head injuries.
Rotational Force Redirection
On angled impacts, the polymer compresses and deforms, absorbing energy and redirecting rotational forces away from the brain — tackling the injury mechanism that straight-impact helmets leave unaddressed.
Works With EPS Foam
ERT doesn't replace the standard EPS shock-absorbing liner — it works in combination with it. Together they deliver a level of protection neither system can achieve alone, plus those soft pads make for an exceptionally comfortable fit.
THE NUMBERS DON'T LIE
Dynamic Research, Inc.
Los Angeles, USA
TASS International
Netherlands
University of Strasbourg
France