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Item # POC001K

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  • Hydrogen White, S/M ($499.95)
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  • Uranium Black, M/L ($499.95)
  • Uranium Black, L/XL ($499.95)
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Item # POC001K

Stay safe.

While speed can be intoxicating, it's never a good idea to lose your head. POC doesn't want you losing your head, so it designed its helmets to be exceptionally safe. The POC Cortex DH helmet is the crown jewel of its work.

POC uses the acronym VDSAP for its system (Ventilated Double Shell Anti Penetration). From the outside in, POC's double layer Cortex DH Helmet has a lightweight carbon fiber outer shell. Then there's the Aramid ballistic Penetration Barrier, or APB in POC speak. It's a layer of penetration-resistant Aramid (basically Kevlar, the same as found in bulletproof vests) between the outer shell and the liner shell. Further in, a thin polycarbonate shell covers the EPP liner material. As a result of this trifecta of protection, the outer shell can be thinner than usual, which makes it both lighter and better at absorbing blunt impact energy.

With the double-shell design, POC positions the vents so that the ones on the outside of the Cortex DH helmet draw air into channels that flow to the inside vents. This way, the vents next to the skull are not exposed to the outside. There are also ear vents that allow for decent hearing while keeping your ears protected. The chinguard is designed to keep your face and teeth ready for family photos, yet it's far enough away from your mouth and well ventilated so you can breathe easily, even when you have to ride up short climbs.

Perhaps the most interesting aspect of the Cortex DH Helmet is its use of MIPS (Multi-directional Impact Protection System) technology. Basically, safety engineers know that most bike crashes deliver your head to the ground, not straight down, but at an angle. These oblique impacts create problems as your helmet hits the ground, sticks, and your brain continues on its original trajectory to a degree. While we have a natural cushioning layer of cerebrospinal fluid that allows some shear between the brain and the skull, POC helmets with MIPS imitate our own fail-safe elements and add another engineered shear zone between the helmet liner and shell to further soften and absorb these rotational energies as they develop during our high-speed crashes. This adds up to the best possible protection for your brain.

The POC Cortex DH Helmet is available in sizes Small/medium, Medium/large, and Large/x-large. It comes in the colors Hydrogen White and Uranium Black.

  • Carbon fiber outer shell
  • Aramid anti-penetration technology
  • Multi-directional Impact Protection System

Tech Specs

Shell Material:
[outer shell] carbon, [inner shell] polycarbonate
Multiple Impact:
yes, MIPS system
airflow system
Full Face:
EN 1077B, EN 1078, CPSC 1203
Claimed Weight:
2 lb 3.27 oz
Recommended Use:
mountain biking
Manufacturer Warranty:
1 year

Size chart

Fuji Bicycles


Geometry Chart


Altamira LTD

Seat Tube


Effective Top Tube








Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Drop


Chainstay Length



44 44.0cm 51.5cm


36.3cm 72.1cm


72.0 deg 75.0 deg 6.9cm 40.5cm 97.1cm
47 47.0cm 53.0cm


37.0cm 74.1cm 13.0cm 72.5 deg 74.5 deg 6.9cm 40.5cm 97.7cm
50 50.0cm 54.5cm 54.0cm 37.0cm 76.0cm 14.0cm 73.0 deg 73.5 deg 6.9cm 40.5cm 97.6cm
53 53.0cm 56.0cm 56.0cm 37.9cm 78.3cm 16.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 98.6cm
55 55.0cm 57.5cm 58.0cm 38.9cm 80.1cm 18.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 100.1cm
58 58.0cm 59.0cm 60.1cm 39.7cm 82.1cm 20.0cm 74.0 deg 73.5 deg 6.9cm 40.5cm


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Here's what others have to say...


Best Protection & Best Service

  • Familiarity:I've put it through the wringer

In our busy daily lives, I found it very handy to be able to communicate with a human representative and expert rather than searching for insightful reviews (such as with this awesome helmet).

My sport of choice is mountain biking (XC and DH), and Bill, from Back Country, was extremely helpful throughout my purchases. For example(s):
1. Ordered seat dropper (Thomson), he assisted with new label and shipped the correct one over night.
2. This helmet, provided input and assisted with price matching.

I can go on....

Long story short, I do all of my bike shopping at Back Country now.

Now to the helmet, I bought this for DH only, and I found it very comfortable. It barely required any adjustments (L-XL size)l only the clips.

Moreover, the few times I used it in Northstar, I didn't find it too hot, and, to be clear, I'll take safety over hot any day.

That's exactly the point of this helmet, it's the best protection possible which in turn provided me with confidence to push myself further (drops,jumps, speed, etc). In turn, the net FUN of the ride is much higher.

Perhaps the helmet or the Go Pro I tried, I learned to minimize my head movement, but I can't point to finger to which with confidence.

In the picture you can see the goggles and DBX 6.5 also purchased here.

Best Protection & Best Service