The Tag That Decides Everything
Buying a helmet has become an exercise in preference. Riders compare shell weight, ventilation channels, the fit of the harness, whether the color reads navy or true black under arena lights. Almost none of that comparison touches the one detail that actually governs whether a helmet may be worn in the ring at all: a small tag sewn into the liner, certifying that the helmet passed a specific laboratory test. Under U.S. Equestrian's General Rules, any helmet worn while mounted at a hunter or jumper competition must meet the ASTM F1163 standard and carry the SEI certification mark. That tag is the entire legal bar. It says nothing about how that helmet compares to the one on the shelf beside it.
The test behind that tag has a narrow job. ASTM F1163 drops a helmeted headform onto two surfaces — a flat anvil and a rounded "equestrian hazard" anvil meant to mimic a rail or a hoof — and measures how much the head decelerates in a straight line. Snell's competing E2021 standard, also accepted by the FEI, runs a similar drop test and caps linear head acceleration at 275g. Every currently accepted equestrian helmet standard, American, British, or European, is built the same way: pass or fail, and measured almost entirely on linear force. None of them puts a number on how much the head is allowed to spin.
Sixty-Nine Falls, One Concussion
That gap is not a theoretical complaint from safety advocates. It is the FEI's own conclusion, reached after it looked at its own numbers. In 2022, FEI eventing recorded 21,470 starters and 912 rider falls worldwide — a fall roughly every twenty-four starts. Concussions followed at a rate of about one for every sixty-nine falls, or one for every 1,263 starts overall. Those figures became the baseline for an FEI Helmet Working Group, convened in April 2023 with engineers, standards specialists, physicians, helmet manufacturers, and an athlete representative, tasked with deciding whether the sport's testing standards were still doing their job.
The group's technical report, published in December 2023, did not equivocate. Existing helmet standards, it found, rely on testing protocols that predate the current understanding of how concussions actually happen: not primarily through straight-line impact, but through the rotational force that spins the brain inside the skull. The report set an aspirational target — halving the concussion rate from one in 1,263 starts to one in 2,500 within five years — and recommended that helmet testing add oblique impact tests, dropping a headform at an angle to capture the twisting motion a fall actually produces, alongside a proper injury-reporting system to track whether any of it works.
What Changed, and What Didn't
Something did move. Effective January 1, 2026, the FEI narrowed the list of certifications it accepts, dropping older standards like ASTM 2004a/2013 and Snell E2001, and set a phase-in requiring, by January 1, 2028, that a competition helmet meet at least two of the four standards it now accepts: Britain's PAS 015:2011, America's Snell E2016 or E2021, the CE-marked EN 1384:2023, or America's ASTM F1163:2023. That European standard even added an angled hit against the rounded hazard anvil, closer to how a fall actually lands than a straight drop. Read quickly, it looks like the reform the Working Group asked for — until the fine print settles in.
EN 1384:2023 changed the angle of the impact. It never added a measurement for what that angle was meant to reveal: how much the head actually rotates. A standardized way to measure rotational force did not exist when the standard was published, so none of the currently FEI-accepted certifications — American, British, or European — puts a limit on it. The federation raised the floor on which old tests it will still accept. It has not yet required the new one its own researchers designed the recommendation around.
The Rating System Built to Fill the Gap
Into that space stepped a university lab with no regulatory authority and, as a result, no obligation to stop at pass or fail. Virginia Tech's Helmet Lab released its first Equestrian STAR ratings in December 2022, applying the same biomechanical scoring system it had already built for football, cycling, and motorcycle helmets to the sport. In April 2025, researchers Lauren Duma, Steve Rowson, and colleagues published an updated methodology in the Annals of Biomedical Engineering, adding two oblique impact tests to the protocol and reducing the weight given to low-speed hits — a change made specifically in response to the FEI Working Group's own 2023 findings. "Rotational motion of the head is very important," Rowson, the lab's director, said of the update.
The lab's own data underscores why a single pass/fail line was never going to be adequate. Across its testing, peak linear acceleration measured in a straight pendulum impact was only weakly correlated with peak linear acceleration measured in an oblique one — and peak rotational acceleration between the two impact types showed no meaningful correlation at all. A helmet that performs well against a head-on hit tells you very little about how it performs against the angled, glancing impact of an actual fall. Two helmets, both carrying a valid SEI tag, both fully legal for the show ring, can sit at opposite ends of Virginia Tech's five-star scale — a difference the certification tag itself has no way to disclose.
What Riders Are Actually Doing With That Information
Most are not using it, and the data on why is unflattering to marketing more than to riders themselves. A 2025 study in the Clinical Journal of Sport Medicine, run through the University of Alabama at Birmingham's Equestrian Sports Medicine Collaborative, surveyed 357 collegiate equestrian athletes. More than half had fallen off a horse in the previous year. Concussion was the single most commonly reported type of head injury. And when the researchers checked whether helmet brand or the presence of MIPS — the rotation-dampening liner now built into a wide range of premium helmets and marketed heavily on that basis — was associated with lower injury rates, they found no difference. Riders with more experience reported fewer head injuries than novices did; the helmet they happened to be wearing did not predict the outcome nearly as well.
The same study found that 78 percent of riders would not replace their helmet after every fall, despite the well-established guidance that a helmet's protective foam can be compromised by an impact with no visible crack. A separate 2023 study in the Journal of Science and Medicine in Sport, tracking 210 riders with an average of 27 years in the saddle, recorded 728 concussions across the group and found riders were wearing a helmet at the time of injury 85 percent of the time. The concussion incidence while riding, 0.19 per 1,000 hours, was roughly six times the rate recorded while simply handling horses on the ground. Helmets were on. Concussions still happened anyway. Neither finding argues against wearing one. Together they argue that which helmet a rider chooses, and how carefully it gets maintained afterward, matters far more than the sport currently acts like it does.
What the SEI Tag Won't Tell You
A valid ASTM/SEI or FEI-accepted certification means a helmet passed a linear-force drop test — nothing about rotational protection is measured or disclosed
Virginia Tech's Equestrian STAR ratings (helmet.beam.vt.edu) score helmets on a five-star scale that includes oblique, rotational-force testing most certifications skip entirely
MIPS and brand name were not associated with lower injury rates in the largest recent collegiate study — fit, condition, and replacement habits matter more than marketing claims
Replace a helmet after any real fall, even without visible damage — 78 percent of surveyed riders admitted they don't
FEI's own accepted standards list is still changing through 2028; recheck a helmet's certification before assuming last year's tag still qualifies
The Standard the Sport Asked Itself For
None of this is a story about a federation ignoring its own experts. The FEI convened the Working Group, published its findings, and has already begun tightening which certifications it will accept — that is more institutional follow-through than several of the sport's other safety debates have managed. But three years after its own researchers identified rotational force as the missing variable in equestrian helmet testing, not one standard the FEI currently accepts measures it. The five-year window the Working Group gave itself runs to the end of 2028. Until a rotational standard exists and is required, the only way a hunter/jumper rider can know whether a "legal" helmet is closer to the top or the bottom of the field is to check a university lab's voluntary rating, not the tag sewn into the liner.
That is a reasonable thing to ask of a buyer who already treats a saddle fitting or a pre-purchase exam as worth the extra hour. A helmet earns a place in the tack trunk the same way: checked against the best available data, not just the minimum the rulebook currently requires. Shop for one the way this sport already shops for everything else that protects a rider's body for a season — starting with NHE's own edit for riders — and check the STAR rating before checking the price.
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