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  • In-Mold™ technology bonds the helmet's tough outer microshell to the impact-absorbent expanded polystyrene liner, creating a light, cool and strong helmet
  • Roc-Loc® 5 suspension fits like a dream, holding the helmet in place effortlessly; anchors directly into the liner for great durability
  • Wind Tunnel™ vents channel airflow through the Giro Sonnet helmet for maximum cooling in the heat of competition


View all Giro Road Bike Helmets

REI membership


Best Use Road Cycling
Helmet Style Road
Helmet Construction In-mold
Head Circumference
20 - 21.75 inches
21.75 - 23.25 inches
Vents 25
Visor No
Weight 262 grams
Gender Women's
Rated 4 out of 5 by from Good all purpose helmet. I have found that getting a comfortable fit can really vary from style to style even from the same company. There are lighter, but more expensive helmets. I got this for commuter riding. The second time I wore it I was in an accident. The helmet shows no signs of damage and neither did my head. Isn't that why we wear these?
Date published: 2014-04-13
Rated 4 out of 5 by from Comfy, but odd decoration on back It's a comfortable helmet for a reasonable price, but REI should include one more photo of the rear view of these helmets. The titanium one has a very strange blue segment that says "back yard barbeques" on it! Maybe some women would like this, but I did not, and returned the helmet. There is a men's version of this same helmet called the Savant, and it does not have any unexpected decorations in the back!
Date published: 2014-06-15
Rated 5 out of 5 by from Great Helmet I like this helmet a lot: well ventilated, nice padding (can be detached: nice feature). The only negative is that adjusting the strap is a tad tedious.
Date published: 2013-04-08
Rated 1 out of 5 by from Disappointing When I got this helmet, REI did not have many helmets in stock. I went for the Giro because it was the same brand i had before. In the end, I tried on a friend's helmet from a competing manufacturer and found it to be tremendously more comfortable - and when i thought about it, my last Giro was uncomfortable too. Guess i thought all helmets were uncomfortable, until I tried the Bell...
Date published: 2013-08-14
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