Run in direct sun long enough and you feel it on your ears first. Then the back of your neck. A standard running cap shades your eyes and the top of your head and leaves the rest exposed for however long you're out there.
We're based on Australia's Sunshine Coast, under some of the strongest UV readings anywhere in the world, so working out what a hat actually protects has been part of the job since we started. This holds up wherever you run: ridgelines in Colorado, a summer loop through London, clifftop trails along Victoria's Great Ocean Road, fell loops through England's Peak District. Here's how the two styles compare on coverage, UPF, breathability, fit and which runs suit which hat.
What each style covers
The running cap
A running cap covers the crown and shades your forehead and nose. That's the full extent of it. Your ears and the sides and back of your neck sit in direct sun for the whole run. Our M-Series running caps use the five-panel shape we've built on since 2018, with an adjustable rear strap and a rotation of breathable fabrics. The coverage is what it is.
The legionnaire hat's neck flap
A legionnaire hat, sometimes called a running hat with neck flap, adds a fabric cape that wraps around the ears and drops to the collarbone. That single addition shifts your ears and neck from exposed every run to mostly shaded.
"I wanted the flap to drop past the collarbone, because that's where sunburn on the back of the neck actually starts, not at the hairline where most designs stop."
— Matt Niutta, Fractel founder
Our legionnaire running hats, like the L-Sahara, pair the flap with a chin clip and corner buttons so it holds when the wind picks up. They run in two sizes, 59cm and 62cm, with a 6cm brim, so check your head circumference against the size guide before you buy.
Sun protection: UPF ratings vs real coverage
A UPF rating measures how much UV a fabric blocks, not how much skin a hat covers. Moving from UPF 30 to UPF 50 fabric only takes you from blocking 96.7% of UV to 98%. That gap barely matters next to whether the hat covers the skin at risk. SunSmart is explicit that caps and visors can't claim a UPF rating at all, because they don't provide the coverage a rating requires. To carry one, a hat has to protect the face, ears and neck.
ARPANSA's research on hat protection backs this up. A baseball-style cap shades your forehead and nose but gives your ears and neck almost nothing. A legionnaire hat scores well above that on ear protection, thanks to the flap, though a full broad-brim hat still edges it out. On the L-Sahara, the UPF 50+ rating applies to the crown and peak. The flap does its job through physical coverage rather than a rating of its own.
Breathability and heat on the run
A cap with mesh or perforated panels dumps heat efficiently off the crown, and running-hat reviewers rate laser-cut mesh panels as the biggest lever for keeping a cap feeling cool. A running-heat study on cap wearing backs that up: headwear doesn't meaningfully shift core body temperature, but it does raise forehead skin temperature and change how hot your head feels. For track sessions, tempo runs and anything in the heat, a ventilated cap usually feels better in the moment.
A legionnaire hat adds fabric around the ears and neck, and on very hot days that extra surface can feel warmer. The trade narrows when the flap is a light, quick-drying fabric with proper crown ventilation. That's how we build our L-Series. On a long run in open sun, the shade over your ears and neck tends to outweigh feeling a touch warmer.
Fit, pack size and wind
Both styles pack down small enough for a vest pocket. A Fractel legionnaire hat runs about 90g, against about 60g for a Fractel running cap. That's the flap's fabric, and it's not enough weight to notice once you're moving.
Where they differ is stability in wind. A standard cap with a snug adjuster sits low and steady at any pace, with little surface area to catch a crosswind, which suits fast road work or exposed ridgelines in strong gusts. A legionnaire hat with a secure chin clip holds well through steady efforts, but a loose flap in sustained wind will flap and pull at your attention. Clip it down before you start and it's a non-issue.
Which style suits your run?
A hat with a sun cape can feel like overkill for a short run, but it makes far more sense on longer outings when the UV index climbs.
A running cap suits road running, track sessions and tempo efforts where airflow matters most, runs under 90 minutes with sunscreen properly applied beforehand, and tree-lined routes with reliable shade.
A legionnaire hat is the better call for trail runs and ultras across exposed country: ridgelines, alpine plains, desert tracks, anywhere the sun sits on your neck and ears for hours. It's also worth reaching for when you'd rather not rely on reapplying sunscreen to your ears and neck mid-run, one of the areas runners miss most.
For a well-built standard cap, our running cap range covers a range of fits and fabrics for different conditions. For full neck and ear coverage, the legionnaire range is where to look. Plenty of runners end up owning both and reaching for whichever one the run calls for.
FAQs
Is a legionnaire hat too hot for running?
A little warmer than a ventilated cap, because of the extra fabric. But the difference is small next to the coverage it adds, and most runners find the trade worth it on long runs in open sun.
Do running caps need a UPF rating?
A cap's crown can carry one, but the hat as a whole can't be UPF rated, since the brim and open sides leave too much skin exposed. Sunscreen still does most of the work on your ears and neck.
Leave a comment