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Giro Atmos Helmet - Women's

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Item # GIR0290

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Item # GIR0290


Female cyclists on the competitive road and cross-country circuits aren't the only ones who count on Giro to protect their heads. Through premium fit and expert design, the Giro Women's Atmos Helmet provides the comfort and protection that commuters, recreational cyclists, and even weekend mountain bikers swear by. Air channels through the highly-vented design to keep your head cool while the adjustable rear lets get the best fit with a simple turn of a dial.

  • Roll Cage structure offers premium protection through energy transfer upon impact
  • In-mold construction features a lightweight EPS liner glued to the polycarbonate shell for shock absorption
  • Wind Tunnel design utilizes 26 vents to channel cool air in and warm air away from your head
  • Roc Loc 5 dial fit system allows instant, one-hand adjustment

Tech Specs

[shell] plastic, foam
Adjustable Vents:
Fit Adjustment:
slidelock chin
CE EN1077
Claimed Weight:
255 g
Recommended Use:
cycling, commuting, cross country mountain biking
Manufacturer Warranty:
1 year

Size chart


Adult Cycling Helmets
 SS/MMM/LLXLAdult UniversalWomen's Universal
Head Circumference 20 - 21.75in
(51 - 55cm)
20 - 22.5in
(51 - 57cm)
21.75 - 23.25in
(55 - 59cm)
21.75 - 24in
(55 - 61cm)
23.25 - 24.75in
(59 - 63cm)
24 - 25.55in
(61 - 65cm)
21.25 - 24in
(54 - 61cm)
19.75 - 22.5in
(50 - 57cm)
Head Circumference 20 - 20.75in
(51 - 53cm)
21.25 - 22in
(54 - 56cm)
22.5 - 23.25in
(57 - 59cm)
23.5 - 24.25in
(60 - 62cm)
How to Measure:
For best results, use a tape measure to measure around your head where your hat would fit comfortably.

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Here's what others have to say...


Color is misleading

    This helmet is actually purple and white, not the fuchsia and white that the picture presents. This is annoying if you actually want the color that is presented.

    actual color

    I bought one also, and the color is misrepresented on-line. I am keeping the helmet but it is not the color I wanted.

    Beyond the disappointment with the color, what do you think of this helmet. Is it comfortable? Easy to adjust for a custom fit? How easily can it be adjusted for a Buff or thermal cap under helmet? Is it cool on those long hot rides? Can you sport a ponytail under brace on back of helmet, or do you have to thread it between helmet and brace? Does it have a padded helmet liner, or do you have individual padded strips on the inside on helmet? Is this helmet wide on the sides, or is it fairly compact through side?