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GiroManifest Spherical Helmet


Item # GIRZ32Y

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Item # GIRZ32Y

Why We Like The Manifest Spherical Helmet

The Manifest Spherical Helmet premieres Giro's revolutionary Spherical Technology for enhanced safety on the trail. Powered by MIPS, Spherical Technology utilizes a similar slip-plane design as MIPS for greater impact absorption at angular crashes, except Spherical opts for two layers of foam with a slip-plane between the two, instead of a plastic liner. This redirects impact energy by rotating the exterior liner independently from the interior liner, and it enables greater ventilation for a cooler time on the trail as well as a safer one.

Giro geared the Manifest for sweaty riding in hot weather with nineteen Wind Tunnel vents, all amplified thanks to Aura's reinforcement around the arch. XT2 padding provides a comfortable fit, and the lining wicks sweat, dries quickly, and reduces any unwanted odors. Giro also redesigned the Roc Loc Trail Air Fit System for enhanced durability and dynamic strength. The visor adjusts to accommodate eyewear and goggles, and Giro included grippers to make sure either stay in place.

  • Giro's premiere bike helmet for trail and all-mountain
  • Spherical Technology powered by MIPS for advanced protection
  • Progressive layering addresses high- and low-speed impacts
  • Aura reinforced arch encourages airflow through 19 channeled vents
  • Adjustable visor with goggle and eyewear grippers
  • Roc Loc Trail Air Fit System includes magnetic buckles
  • Quick-dry padding with XT2 odor control
  • Ages 5 and older

Tech Specs
Shell Materialin-mold
Impact FoamEPS foam
Ventilation19 Wind Tunnel vents with internal channeling
Fit AdjustmentRoc Loc Trail Air
Visoradjustable, screw-in
CertificationsCPSC, CE EN1078
Manufacturer Warranty1 year
Activitymountain biking


Adult Cycling Helmets
Super Fit™
Head Circumference

18.5 - 20in

(47 - 51cm)

20 - 21.75in

(51 - 55cm)

21.75 - 23.25in

(55 - 59cm)

23.25 - 24.75in

(59 - 63cm)

24 - 25.55in

(61 - 65cm)

Head Circumference

21.25 - 24in

(54 - 61cm)

19.75 - 22.5in

(50 - 57cm)

22.75 - 25.5in

(58 - 65cm)

How to Measure:
For best results, use a tape measure to measure around your head where your hat would fit comfortably.

What do you think about this product?


>Rating: 5

Great mtb helmet

I've used it several times
True to size

Quality is amazing and air vents are generous. It's saved my grape a couple of times. The only thing I would have liked is better sweat management. The inside pad doesn't do a very good job at keeping it out of your eyes.

>Rating: 5

So comfortable

I've used it once or twice and have initial impressions
True to size
Size Bought
5` 6"
107 lbs

I absolutely love this helmet. I understand that many people consider it expensive, but when I see bib shorts going for 180 to 280, I think spending 250 on something that will save your life - or quality of life - to be pretty reasonable. Mag closure is super easy once you figure it out. You feel like you're pressing buttons to release it, but really you're just sliding the magnet apart. Once you realize that, it will stop messing with your head! The fit is SO nice. I can see why it's often rated as the most comfortable helmet. Zero pressure points, zero wiggle. I'm so happy I bought it!

>Rating: 1

lesson learned

Size Bought

ordered this helmet for my wife, backcountry debited the $ (almost $300), then a day later they refunded the bc they withdrew 5 cents too much, then re-debited the price of the helmet. so I had ~$600 withdrawn from my account on a weekend for one helmet. How does a company like this make such a blunder?! Wells Fargo said it could take up to 72 hours to accurately show the correction...if backcountry actually corrects their mistake. I had to file a disputed claim to be on the safe side. It’ll be the last time I order anything through backcountry. lesson learned.

Great helmet review! Thank you

>Rating: 4

Comfortable and protective

I've used it several times
True to size
Size Bought

This is a great helmet which I purchased mainly to protect my eyes from the sun and wind because of the visor. It covers my head completely and feels safe and comfortable. I am still having difficulty with the magnetic fastener which is why I List 4 stars. I’ve always worn Giro helmets, however this fastener is not intuitive and many times I miss locking it completely unless I look in the mirror. If it wasn’t such a comfortable, good looking and egg-covering helmet I would have sent it back due to the fastener. My husband liked it a lot and bought one also.

>Rating: 5

Great Helmet

I've used it several times
True to size
Size Bought
6` 2"
190 lbs

This helmet fits great it is very stylish. I really like the mag buckle as it’s easy to attach and detach. The vents are great for getting air over the noggin It’s definitely on the pricey side but you get what you pay for.