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Six Six One Evo AM Helmet with MIPS
Sale $79.98 - $107.97 $199.95 60% Off

Item # SSO007D

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  • Black/Grey, XS/S ($79.98)
  • Army, XL/XXL ($98.97)
  • White/Red, M/L ($107.97)
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Item # SSO007D


The next generation of the next generation of mountain bike helmets.

If Six Six One's new Evo AM Helmet represents the next generation of enduro-ready mountain bike helmets, then this MIPS-equipped version is even nexter. Employing revolutionary MIPS technology that was designed by brain surgeons and physicists to diffuse angled impact forces, the Six Six One Evo AM Helmet with MIPS is one of the most advanced helmets on the trail.

The MIPS feature adds a bit to the price of the standard Evo AM helmet, but we think it's money well spent. MIPS is essentially a semi-floating inner shell that allows the helmet to travel upon impact without taking the head along for the ride, diffusing impact forces without compromising the helmet's weight, comfort, or style.

The Evo's modern-looking shell is built from Contego foam, which was chosen for its energy-absorbing properties. Specifically, it’s claimed to absorb as much as 30% more energy from an impact than the EPS foams used in almost every other certified bicycle helmet. While that may be the most important detail, more subtle refinements, such as the two-position adjustable visor and the user-friendly Boa retention system mean that you don’t have to forgo modern features in the pursuit of protection. And it’s topped off with a Fidlock magnetic buckle that takes pretty much all the effort out of strapping on your lid, despite the fact that it’s completely secure.

  • Equipped with MIPS
  • Contego EPS foam
  • Extended protection at the back of the head
  • Magnetic Fidlock closure
  • Boa adjustment system
  • Odor-resistant liner

Tech Specs

Impact Foam:
Contego foam
Multiple Impact:
15 vents
Fit Adjustment:
360 Degree Boa Fit System
Full Face:
Recommended Use:
trail, all-mountain, enduro
Manufacturer Warranty:
1 year

Size Chart


Sizing Chart


SixSixOne Accessories/Armor
Gloves/Wrist Guards
Palm Circumference 8in
Ankle Brace
US Shoe Size 6-8 8-10 10-12    
Open-Face Helmets/Hats (Recon)
Head Circumference 21.25-22.75in
Full-Face Helmets (Evo,Evo Carbon)
Head Circumference 20.50-21.25in
Elbow Pads (Rage, Riot, Rhythm, Comp, DJ)
Bicep 7-9in
Forearm 6-7in
Knee Pads (Evo, Rage, Rampage, Riot, Rhythm, Comp, DJ)
Thigh 13-15in
Calf 10-12in

Body Armor (Pressure Suits, Core Saver, Air Vest)
Chest 29-32in
(73.7 - 81.3cm)
(88.9 - 101.6cm)
(104.1 - 116.8cm)
(121.9 - 127.0cm)
Waist 23-27in
(58.4 - 68.6cm)
(68.6 - 78.7cm)
(78.7 - 88.9cm)
(106.7 - 111.8cm)
How to Measure:
For best results, take measurements over your underwear.
Measure under your arms, around the fullest part of your chest.
Natural Waist:
Measure around your natural waistline, keeping the tape a bit loose.
Measure around the fullest part of your thigh above your knee.
Measure around the fullest part of your calf.
Measure around the fullest part of your bicep above your elbow.
Measure around the fullest part of your forearm below your elbow.
Head Circumference:
Measure around your head where your hat would fit comfortably.
Measure around your hand at the widest point excluding the thumb.

Reviews & Community


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Fits smaller than stated

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: Runs small
  • Size Bought: M/L

Haven't used it yet, just got it. I got the size that was supposed to fit per measurements and about 5 other helmets I regularly use, and this one definitely fits smaller than the rest, including other MIPs helmets. I'm sure the next size up would probably be too big. Just fair warning if you're on the border between sizes. Quality seems good, the boa and magnetic clasp seem like nice touches.

661 MIPS

  • Familiarity: I've put it through the wringer

This is an incredibly comfortable helmet. The Boa closure is the best system I have tried on any bike or snow helmet.

I agree that the MIPS seems like a rip off but, the way I see it, an extra 50$ to reduce my chance of concussion is a bargain. Just read the article titled "Senseless" in Bicycling magazine from June 2013 and you'll be sold!

I've been using this helmet for 2 years and have every intention of replacing it with the exact same model when it comes time.

661 Mips

  • Familiarity: I returned this product before using it

The MIPS in this helmet is a ripoff. On a non-MIPS helmet, the sweat pads attach to velcro tabs glued to the styrofoam of the helmet. For the 661 version of MIPS, they have attached a 50 cent sheet of thin yellow plastic to the styrofoam, and the sweat pads velcro to the plastic. Because the plastic has cutouts for the vents, the MIPS consists of a few narrow fingers of plastic extending between the vents. So, not even 50 cents worth of plastic--more like 25 cents. Does that justify the $50 increase in price over the non-MIPS version? Will it even work? I guess 661 thought it was a genius idea because they could take the non-MIPS version of the helmet and slap on a thin piece of plastic, and voila the same size helmet will fit you. No need to make a new mold for the MIPS version. Hurray!

If 25 cents worth of thin plastic is enough to keep me from getting a concussion, I'd say it was worth every penny. If you don't buy in to the technology, you shouldn't get a MIPS helmet. They generally fit a little smaller, but this one even more so. I think it's mostly thicker padding that makes the size smaller.

And comfortable too...

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: XL

This is a great helmet. I have worn Giro, POC and Bell. This is the most comfortable helmet I have ever put on, Mountain or Road. And, it has MIPS, Boa tightening, and a great magnetic clasp. If there is even a minor negative, it is that the visor is not really adjustable.