Choosing a ski helmet isn't about brands or colours: it's about size, fit and certification. A good helmet in the wrong size protects you less than a simple one that fits properly. In this guide you'll see how to measure your head, how to check the fit in the shop, what the EN 1077 standard means, how the different shells compare, what rotational protection adds and when it's time to replace your helmet. At the end you'll find when it's worth buying one and when it's better to rent it at the resort.
How to Measure Your Head and Choose Your Ski Helmet Size
Helmet sizes are given by head circumference in centimetres. To measure it:
- Use a flexible measuring tape, the sewing kind. If you don't have one, use a piece of string and then a ruler.
- Wrap it one or two centimetres above your eyebrows, above your ears and around the most prominent part of the back of your head.
- Keep the tape level and don't pull it tight. Measure two or three times and go with the largest measurement.
- If you have long hair and usually ski with a ponytail or braid, measure with your hair done the way you'll ski.
With that measurement, look up your size in the manufacturer's chart. This table is only a guide, because every brand has its own ranges and they often overlap:
| Size | Head circumference (approximate) |
|---|---|
| XS | 48–52 cm |
| S | 52–55 cm |
| M | 55–58 cm |
| L | 58–61 cm |
| XL | 61–64 cm |
Two important points. First, heads don't just vary in size but also in shape: some are rounder and others more oval, and each manufacturer works with a different head form. That's why two helmets in the same size can fit you very differently. Second, the rear adjustment dial is for fine-tuning within a size, not for turning a large helmet into a small one.
Fit Tests Before You Decide
The measurement gets you close to the right size; the tests tell you whether it's the right helmet for you. Always do them after wearing the helmet for a few minutes and, if you can, with your ski goggles on:
- Position: the front edge sits one or two fingers above your eyebrows. If it slides back and leaves your forehead exposed, it's too big or not positioned properly.
- Skin test: without fastening the strap, move your head side to side and up and down. The helmet should move the skin on your forehead with it, not slide over it.
- Roll-off test: with the strap fastened, push the helmet forward from the back of your head and backward from your forehead. It shouldn't come off or leave your forehead exposed.
- Strap: adjusted so that one finger fits between the strap and your chin. The side straps should form a «V» just below your ears.
- Pressure: there shouldn't be any pressure points. Slight, even pressure is normal; a specific spot that bothers you after a minute will hurt by mid-morning.
- Goggles: the goggle frame should sit flush against the edge of the helmet, with no gap on your forehead, and the helmet shouldn't push the goggles down onto your nose.
Safety Standards: EN 1077 and Its Classes A and B
In Europe, helmets for alpine skiing and snowboarding are certified to the EN 1077 standard. Look for the reference on the label inside the helmet, next to the CE marking. Among other things, the standard tests impact absorption, resistance to penetration by objects, the strength of the strap and its buckle, and that the helmet doesn't restrict your field of vision too much.
EN 1077 distinguishes two classes:
- Class A: covers a larger area of the head, including the ears, and is more demanding in the penetration test. It's usually found on helmets with a more closed shell and on models designed for racing.
- Class B: covers slightly less area, allows soft ear pads and permits more ventilation openings. Many recreational helmets fall into this class.
Both are valid for skiing; class A isn't «better» for everyone, just more enclosing. Outside Europe you'll see other standards, such as ASTM F2040 in the United States, and some helmets meet several at once. Official competitions have additional requirements set by the federations.
Shell Types: In-Mold, ABS and Hybrid
Almost all ski helmets have two layers: an outer shell that spreads the impact and resists scrapes, and an inner foam (usually EPS, expanded polystyrene) that absorbs the energy of the impact by crushing. What changes is how they're joined:
| Type | What it is | Advantages | Things to consider |
|---|---|---|---|
| In-mold | Thin polycarbonate shell fused with the foam in the same mould | Lighter and easier to ventilate | The shell dents more easily from small knocks |
| ABS (hard shell) | Thick injection-moulded plastic shell bonded to the foam | Stands up better to daily wear and tear, knocks against lifts or in the car boot | Heavier and bulkier |
| Hybrid | ABS upper section and in-mold lower section | A balance between durability and weight | Varies a lot from model to model |
That's why rental helmets usually have tough shells: they go through many hands and many car boots.
Rotational Protection: MIPS and Other Systems
In a real fall, your head almost never hits head-on, but at an angle. That oblique impact creates a sudden twist that traditional foam, designed for direct impacts, isn't built to absorb. Rotational protection systems aim to reduce that rotational force.
The best known is MIPS, a low-friction inner layer that lets the helmet move a few millimetres relative to your head at the moment of impact. Other manufacturers use their own solutions, such as internal structures that deform or liners that slide. There's no single standard that compares them with each other, so treat them as a desirable extra, not a substitute for the basics: correct size, firm fit and EN 1077 certification.
Ventilation, Warmth and Comfort
- Adjustable ventilation: vents that open and close with a slider are very useful in spring or if you hike up. Some channel air towards your goggles to help stop them fogging up.
- Ear pads: ideally removable. They keep the cold out in January and can be taken off on mild days.
- Liner: if it's removable and washable, the helmet stays hygienic for much longer.
- Weight: a few grams less make a difference on long days, especially for children.
- Buckle: magnetic buckles or large click buckles can be opened and closed with gloves on.
Under the helmet, at most a thin helmet liner or a neck gaiter. A thick beanie changes the fit and the helmet no longer sits properly.
Helmets with an Integrated Visor
A visor helmet replaces goggles with a lens attached to the helmet itself that slides up and down. It has clear advantages: it goes on in one movement, there's no gap between helmet and goggles, and many models leave room to wear prescription glasses underneath. On the downside, the visor doesn't seal against your face like goggles, a bit more air can get in when it's very windy, and swapping lenses is less common. The visor uses the same lens categories as ski goggles: check which one it has for the light you usually ski in.
Compatibility with Ski Goggles
Helmet and goggles work as a set. If there's a gap on your forehead between the two, the wind will hit your skin and that area will get cold straight away. If the helmet pushes the goggles down, they'll press on your nose and you'll breathe less easily. Try them on together whenever you can, and check that the goggle strap stays secured at the back of the helmet; many have a clip for this. If you need goggles, our ski goggle rental page explains how to choose the lens and colour.
Audio and Accessories
Some helmets come with ear pads designed for headphones or intercoms. If you use them, keep the volume at a level that lets you hear anyone coming up behind you. Before sticking on camera mounts, drilling or painting the helmet, check with the manufacturer: you could damage the shell or affect the certification.
Ski Helmets for Children
With children, measure the size every season: they can go up a size from one winter to the next. Don't buy or rent a helmet that's too big «so it lasts», because it will shift with any knock and leave their forehead exposed. Check that the strap is properly fastened every time they put it on, that their goggles fit the helmet without pressing on their nose and that the helmet is light, because they'll be wearing it for many hours. Bright colours help you spot them on the slopes. Many ski schools require one in their lessons, and in some countries it's mandatory for minors.
How Long a Ski Helmet Lasts and When to Replace It
The inner foam of a helmet is designed to absorb an impact by crushing, and once crushed it doesn't recover its shape. That's why the most important rule is this: after a hard knock, replace the helmet, even if it looks intact on the outside. A fall in which you hit your head on ice, a tree or a rock counts.
Even without knocks, the materials age with sun, temperature changes and sweat. A common recommendation from manufacturers is to replace it after about five years of use, sooner if you ski a lot. Signs that the time has come:
- Cracks, dents or sunken areas in the shell or foam.
- A frayed strap or a buckle that doesn't close properly.
- Worn-out pads or liner that no longer hold your head in place.
- The helmet moves even with the dial fully tightened.
Store it dry, away from radiators and direct sunlight, and don't carry it loose in the car boot. And avoid second-hand helmets: you don't know whether they've taken a knock.
Should You Buy or Rent a Ski Helmet?
If you ski many days a season, having your own helmet makes sense: you get used to one fit, you match it with your goggles and you know its history. If you ski one or two weeks a year, renting is more practical: you travel lighter, children always wear their current size and you don't keep a helmet at home whose condition you're unsure of after a fall. Rental helmets are handed over checked and sanitised, and the fit test is done in the shop before you head up to the slopes. You can book one by the day at your resort from our ski helmet rental collection.
Frequently Asked Questions
What are the best ski helmets?
The ones that fit your head with no play or pressure points, are certified to EN 1077 and fit well with your goggles. Beyond that, rotational protection, adjustable ventilation and low weight are all pluses. The brand matters less than the fit: try several models, because each manufacturer uses a different head form.
How long does a ski helmet last?
Until the first hard knock: after that it needs replacing even if there's no visible damage. Without knocks, a common recommendation from manufacturers is to replace it after about five years of use, or sooner if you see cracks, a worn strap or a worn-out liner.
How do I choose the right ski helmet size?
Measure your head circumference with a flexible tape, one or two centimetres above your eyebrows and around the widest part of the back of your head, and look up that measurement in the manufacturer's chart. If you're between two sizes, try both and go with the one that doesn't move when you turn your head without squeezing.
Can I use a bike helmet for skiing?
It's not recommended. Bike helmets are certified to a different standard (EN 1078), designed for other types of falls and temperatures. For skiing and snowboarding, use a helmet certified to EN 1077.
