Scottish brand’s new helmet combines MIPS and Koroyd for all-round trail safety

Product Overview

Overall rating:

Score 9

Endura MT500 MIPS helmet


  • Comes with both Koroyd and MIPS protection, looks and feels good thanks to the refined finishing details, and has great eyewear storage


  • Sizes come up fairly small compared to other helmets on the market


Endura MT500 MIPS helmet review


Price as reviewed:


Endura recently announced that it had given its helmet range a refresh, part of which involved giving the popular MT500 a complete overhaul. This came as a result of a new partnership with MIPS alongside its existing relationship with Koroyd, and the brand new MT500 MIPS boasts a double dose of safety technology. Good enough to make it one of the best mountain bike helmets on the market? Time to find out. 

Need to know:

  • Features both MIPS and Koroyd impact protection technologies
  • Adjustable visor
  • S/M, M/L, L/XL helmet sizes
  • Good ventilation and air flow
Detail showing visor in up position on Endura MT500 MIPS helmet

The visor position is adjustable, with ample room for stowing glasses or goggles

Attending the launch in the sunny Dolomites, we were able to get up close and personal with the new helmet range, chat to representatives from Endura, MIPS and Koroyd about how they worked together to seamlessly integrate their respective technologies into one package, and then spend some time putting the MT500 MIPS helmet’s mettle to the test.

So the question here is, does combining the two leading safety technologies create the ultimate helmet, or is it overkill?

Visually, the MT500 MIPS has a more modern aesthetic over the previous iteration, with sleek lines and a matte finish. There’s now more coverage at the front and rear, providing full protection from the base of the skull to the forehead, and it sits quite low, about a finger’s width above the brow.

Endura MT500 MIPS helmet safety features

The main talking point here is how Endura has managed to integrate both Koroyd and MIPS technology together. Quite simply, the vast majority of the helmet features a layer of Koroyd, about an inch thick, leaving space in the centre for a GoPro mount, while the MIPS layer is placed over it. Relinquishing its distinctive yellow colouring, the MIPS layer here is a dark grey, so it blends in with the rest of the helmet’s aesthetic. 

Detail photo showing inside underneath of Endura MT500 MIPS helmet

The big news here is that Endura have combined two safety systems; MIPS and Koroyd

Colours aside for a moment, the MIPS layer is a plastic liner that moves independently from the rest of the helmet. The thinking behind the technology is that when the head is knocked in a crash, more often than not, the impact happens at an angle and the head continues to roll, or rotate, against the surface with which it’s collided.

This is believed to be the cause of many brain injuries, including concussion. By moving freely, the MIPS layer has been shown to allow for this natural movement to take place without damaging the brain.

Moving onto the Koroyd layer, in this particular colourway it retains its bright green hue, and is recognisable from its honeycomb-like structure of welded tubes. These individual tubes are fused together and designed to crumple in the event of an impact, shielding the head from potential brain injuries by absorbing dangerous forces.

While Koroyd (the company) dreams that one day Koroyd (the technology) will completely replace EPS foam (the more traditional material used in bike helmets), there’s still a way to go for that to happen. As such, the MT500 MIPS still features a significant section of EPS foam around the back of the helmet, essentially where the grey panel is.

Endura MT500 MIPS helmet fit, ventilation and features

Other aspects of the helmet’s makeover include more refined finishing touches, like the fitment system and strap dividers, both of which are more sleek and premium in feel. Fitment is 360 degrees, while the wide strap dividers make it much easier to achieve a comfortable fit with the straps sitting flat against the face.

Detail photo showing rear ventilation on Endura MT500 MIPS helmet

The MT500 offers good coverage for a trail lid, and plenty of ventilation

The visor, meanwhile, is adjustable, and can be moved between three positions, and beneath its hinges are two vents that are long and narrow in shape, and double up as decent eyewear storage.

There are plenty of ventilation points across the helmet, not only in the form of the large gaps within the outer shell, but also the Koroyd layer itself is essentially an open-cell structure that allows maximum airflow, and this was noticeable while testing out the helmet for an afternoon in 30 C weather.

According to Endura, the MT500 MIPS helmet is designed for all-day riding, and therefore the brand has attempted to make it fit as comfortably as possible. The padding is pretty plush, and does a good job of cradling the head at the front and sides. Once you’ve had some time to play around with the strap dividers, it really is possible to achieve an excellent fit there as well.

Photo detail showing adjustment ratchet at the back of the Endura MT500 MIPS helmet

The twist-to-fit adjustment allows you to tailor each size to your head

The only gripe I might mention here — and it really is nit-picking what is definitely shaping up to be an excellent helmet — is that the overlapping sizes might prove to be difficult for some folks to find the right fit. I say this because I found the sizing to come up quite small, although I wasn’t badly affected by this at all. I just wonder if it might prove troublesome for those with larger noggins.

As someone with a peanut for a head, I found the Small/Medium size to fit me perfectly with few adjustments to the dial, meaning that someone with a medium-sized head would probably find that size to be too much of a squeeze. Admittedly there’s also a Medium/Large and Large/Extra Large to choose from, but it may not work for everyone.

Endura MT500 Mips

Endura MT500 Mips

Second opinion – Jamie Darlow

As you’d expect from a helmet made up of lots of little holes, it’s very well ventilated – really the breeziness comes from having more vents though, thanks to the performance of Koroyd.

The MT500 Mips is now around 50g heavier than the original MT500, and £20 more money, which brings it into competition with Troy Lee’s brilliant A3. Endura has made a slightly lighter helmet than the US brand, it’s breezier for sure, but I don’t think it’s as comfortable when riding with glasses. The 360° retention band running round your head is just a little too low, meaning the arms can dig into your head and don’t fit as unobtrusively as they do on the A3.


Crammed with protection, decently light and well vented, the MT500 MIPS is a great helmet that now looks as good as it feels. It’s pricey though, so if you can’t stretch to the MIPS version Endura is selling the original off now for the bargain price of £119.99.


Weight:410g (S/M)
Sizes:S/M, M/L, L/XL