The best ski helmets, ranked on what the maker actually publishes

How these were chosen

We have not worn any of these helmets and we are not going to tell you which one feels best, because we do not know. What we did instead was compile what each maker publishes and do arithmetic on it: the certifications named on the product page, whether a rotational-impact system is included, how many sizes exist and what head circumferences they cover, the published warranty term, and the published price divided by a realistic number of days on snow.

That produces a ranking a reader can check line by line, and the working sits under every score below. The weightings and breakpoints are published on the methodology page so you can disagree with them specifically rather than in general.

The two certifications, and why both matter

A snow helmet sold in the US should name at least one of two standards, and the good ones name both:

A helmet that names neither is not a ski helmet, whatever the listing photograph shows. This is the single most useful filter when buying online, and it eliminates a surprising amount of what a marketplace search returns. The standards guide goes through what each test actually involves.

The thirty-dollar question

The clearest price break in this category is between helmets with a rotational-impact system and helmets without one. MIPS, the most common, is a low-friction layer inside the shell that lets the helmet rotate a few millimeters against your head during an angled impact. Skiing crashes are almost never a clean straight-on hit: a skier who catches an edge arrives at the snow at an angle, and an angle produces twist.

In this group the cheapest helmet with a rotational liner is $69.99 and the cheapest certified helmet without one is $47.99. Over five seasons at five days each, that $22 difference works out at about nine cents a day. That is why the Retrospec is the skip on this page despite being a properly certified helmet at a good price. The full explainer on what MIPS is and is not goes into the evidence.

Getting the size right the first time

Half of what people call comfort is fit, and fit is measurable before you buy. Run a soft tape around the head about a centimeter above the eyebrows and around the widest point at the back, then match that number to the maker’s own chart, not a generic one. The ranges differ: the Smith here covers 51-67 cm across four sizes and the Retrospec covers 55-62 cm across two.

Then check it on your head. Without doing the chin strap up, shake your head side to side. If the helmet slides, it is too big, and a helmet that is too big does not do its job. The full fit check is here, and the children’s size chart is here.

Why a dial matters

Three of these four publish a dial adjuster at the back. It is a convenience for an adult and a genuine cost saving for a child, because a dial with a published range can absorb a season or two of head growth inside one size. Giro publishes 6 cm of adjustment on its youth helmet for exactly that reason, which is why that model appears on the children’s page rather than this one.

What we deliberately did not rank on

• Vent count. Fourteen vents is not twice as good as seven. Ventilation depends on where the vents sit and whether they close, and no maker publishes airflow, so any ranking on vent count would be invented.
• Weight, as a headline. It appears in the specification table because it is published and it genuinely matters for children, but a 50 g difference between two adult helmets is not a reason to choose one.
• Audio compatibility, colors and goggle clips. Real features, none of which change whether the helmet protects you.

Should you buy a helmet at all?

Every resort that rents skis will rent you a helmet, so this is a real question and the answer is not automatic. Our answer is buy, for two reasons that have nothing to do with the commission: a rental helmet has been adjusted by hundreds of other heads and the retention system shows it, and a helmet is one of the cheapest items in a ski kit to own outright.

Run it yourself on the buy versus rent page, which lists the rental rates we use as inputs and shows the break-even day count for every category. For skis and boots the same arithmetic says rent, and we say so there.