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Synthe Mips II Helmet

3.5 out of 5 stars
2 Reviews
Color:Matte Black/Bright Red


Size Chart


Why We Like The Giro Synthe MIPS II Helmet

The Synthe created an undeniable allure when it first hit the peloton, with riders like Marianne Vos so powerfully and elegantly dominating races while wearing the streamlined and form-fitted design. It was an unmistakable presence that somehow found a flattering way to be a vented cycling helmet, and the new Giro Synthe MIPS II will undoubtedly carry that heritage for many miles to come. The updates to the new generation are subtle yet significant. Gone are the separate MIPS and Roc Loc systems, which operate on a more integrated platform to enhance both fit and comfort. And gone are the aero-mesh vent coverings in favor of an open port for increased airflow through the now 19 vent ports and inner channels.

The goal of the Synthe MIPS II is to provide you with a lightweight, more ventilated, and safer riding experience, whether going all-in on a gravel epic into rarer country or if you’re lining up for the championships at a course you’ve ridden dozens of times. And competitively priced below the new Helios Spherical and Aether Spherical, the updated classic packs enhanced value into a race-ready package.


  • Updated legend effortlessly assumes a new mantel
  • MIPS Brain Protection System now integrates with the Roc Loc 5 retention
  • Removal of mesh vents hole covers allows more air flow
  • Reduced overall weight for an even more featherweight experience
  • Thermoformed SL Roll Cage reinforcement for added protection
  • Item #GIRZ33T
Shell Material
In-Mold polycarbonate
19 Wind Tunnel vents, internal channeling
Fit Adjustment
Roc Loc 5 Air Mips
Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older
Claimed Weight
[medium] 10oz
Manufacturer Warranty
1 year

Overall Rating

3.5 based on 2 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 0 reviews
5 Stars - 1 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

July 23, 2024

Airy and light

I've put it through the wringer

On my third one, switched from black to white, and crashed once. Fits perfect, size small. I love that it holds the sunglasses!

Ros long sleeve jersey

Originally reviewed on

2 out of 5 stars

November 15, 2023


I've put it through the wringer
Size Bought:
5' 7"

After less than 3 years of kind use (wash periodically with gentle soap, transport in soft cloth bag, etc), the fit system on the back of my Synthe helmet has snapped. Also, the finish is a combination of gloss and mat, but the mat finish is peeling, I suppose from sun exposure, which is a little ridiculous, given that my head is almost always in the sun when riding...

Ginger L