What the sticker says
A certification sticker carries an expiration date counted from the day the helmet was made — not from anything that has happened to it since.
The problem
The gap nobody built the step for
Two decades of engineering went into making helmets better at the moment of impact. That work succeeded. The step after it was never built.
What that misses
A helmet worn twice a week through four seasons of hits and a helmet that spent those years in a closet expire on the same day.
Why nobody checks
Not because it does not matter. Because there is no way to. There is no test that says whether the helmet is still the helmet that was certified.
It matters most in youth sport, where equipment is shared, handed down and bought secondhand — and the helmet's history is unknown to whoever puts it on next.
The scale
Everywhere a helmet is worn
Sport, military and construction have the same unsolved gap. These are published figures from other people's research, shown to give a sense of scale.
Stock-car racing
~10%
of selected impacts studied (2002–2008); about 25% report a concussion at some point in their career
Open-wheel racing
~6–25%
across studies, depending on era and definition; about 30% report one at some point in their career
Ice hockey
~5–6
per 100 player-seasons at professional level; youth leagues that allow body checking run higher
Professional football
~7%
chance in a single season of one or more diagnosed concussions
Cycling
~24%
of surveyed riders report one at some point; 10–15% head-injury risk in a crash
Construction
~47
per 100,000 workers — the highest count of work-related brain injuries of any US industry
These numbers come from published literature using different methods across different eras. They are approximate and cannot be compared directly with one another. They show scale. None of them is a CFL finding, and none of them is evidence for the technology described on this page.
Where we stand
What we are not saying
This is pre-validation research. It is not a finished product, not a clinic, and not a medical device. Capital Forge League is not claiming that anything here reduces concussions, and will not claim it before testing supports it.
The claim is narrower, and you can check every part of it:
- The gap is real — certification counts from the manufacture date, not from use.
- Nothing fills it today — no field test tells you whether a helmet is still sound.
- A credible engineering path exists, and CFL holds assigned patents on it.
Student teams do the work alongside us as an education programme. They keep what they learn. They do not take the patent.