We’ve read the reviews across the web for the Giro Fathom Helmet and summarize the results below:
Universal Ranking
PeakScore: 84 (out of 100)
User Rating: 4.3 stars 
Expert Rating: 4 stars 
Number of Ratings Reviewed: 13
Pros & Cons
Reasons to buy:
User Reviews
- Good fit and ventilation.
- Looks good for off-road and on-road use.
- Attractive color scheme.
- Very comfortable while wearing.
- Uses a good locking mechanism to stay on securely.
- Easy to use retention system for customization of fit and security.
- Very adjustable to provide a snug fit.
Expert Reviews
- Venting is efficient in hot weather.
- Protects sweat from getting in your eyes.
- 2-way Roc Loc 5 system allows you to effectively tighten the helmet to customize your fit.
- Provides 23 vents for ample breathability.
- The rear dial allows you to loosen to fit a winter cap underneath, or tighten during warmer weather.
Reasons NOT to buy:
User Reviews
- Some reports of one side of the strap twisting during use.
- Some complaints about the thin straps and the lack of quality when compared to the rest of the helmet.
Expert Reviews
- Not the lightest helmet on the market, but still a competitive weight.
- The chin strap is too long and can flap around after tightening.
Summary:
The Giro Fathom Helmet is an adjustable, breathable, and comfortable helmet that only has one downside in the flimsy and thin chinstrap. Despite that negative, this is a great option for a helmet, due to the secure locking mechanism, ample ventilation, and easy-to-use rear dial.
Multimedia:
Note: User and expert rankings were reviewed across the web. Some expert reviews include these: 1, 2.