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  • Giro - Fathom Helmet - Matte Black/Gloss Black
  • Giro - Fathom Helmet - Bright Red/Black
  • Giro - Fathom Helmet - Matte Vermillion
  • Giro - Fathom Helmet - Matte White/Black
  • Giro - Fathom Helmet - Matte Black/Camo
  • Giro - Fathom Helmet - Black/Highlight Yellow
  • Giro - Fathom Helmet - Matte Flame/Titanium
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Current Color

  • Giro - Fathom Helmet - Matte Black/Gloss Black
  • Giro - Fathom Helmet - Bright Red/Black
  • Giro - Fathom Helmet - Matte Vermillion
  • Giro - Fathom Helmet - Matte White/Black
  • Giro - Fathom Helmet - Matte Black/Camo
  • Giro - Fathom Helmet - Black/Highlight Yellow
  • Giro - Fathom Helmet - Matte Flame/Titanium

Giro Fathom Helmet

sale $74.97 - $149.95

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    • Matte Black/Gloss Black
    • Bright Red/Black
    • Matte Vermillion
    • Matte White/Black
    • Matte Black/CamoPast season color
    • Black/Highlight YellowPast season color
    • Matte Flame/TitaniumPast season color
    4.557

    7 Reviews

    Details

    Mountainous Atmos.

    If you’re a multi-bike rider, you’re probably familiar with how light, breathable, and comfortable road helmets can be, and have probably wished your mountain helmets could compete. Maybe you’ve even taken to wearing road helmets off-road, and deflecting the inevitable comments about spandex, shaved legs, and Lance. Well, the Giro Fathom can’t do anything about your riding partners’ senses of humor, but since it’s an Atmos with a visor, you’ll be just a bit more incognito. It gets the same, thermoformed Roll Cage SL, the Roc Loc 5 adjustment Giro helmets are famous for, and 26 vents to keep you cool, even on long, exposed, hot climbs.

    • Roc Loc 5 adjustment system
    • SL Roll Cage maintains helmet’s integrity in the event of a crash
    • Removable Visor
    • 26 Wind Tunnel vents move air in, through, and out of the helmet
    • Item #GIR007J

    Tech Specs

    Shell Material
    in-mold polycarbonate, Thermoformed SL Roll Cage
    Impact Foam
    EPS
    Ventilation
    23 Wind Tunnel vents, internal channeling
    Fit Adjustment
    Roc Loc 5
    Visor
    yes, removable
    Recommended Use
    cross country
    Manufacturer Warranty
    1 year

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Just starting to test

    • Familiarity: I've used it several times

    Because of a very wet spring here in Utah I have not had the chance to use this much. The fit seems good so far. I will update this as I get more rides in.

    Now if have several rides in the mid summer months with this helmet and it is working great. Light and airy. I am stoked.

    Light & Cool

    • Familiarity: I've used it several times
    • Fit: True to size

    Live in hot and humid Houston. I replaced an older Giro road helmet with a real visor that blocked the morning sun, that helmet also routed the sweat in the front around your face and no sweat drip on glasses and face until the pads wore out.

    The new helmet is smaller looking lighter and well ventilated, fits well and adjustable. It is cooler than the old one.

    Only negatives are the visor is useless for blocking morning sun.
    I removed it and went back to using a chopped cycling cap for morning sun and there are vents in front that do help cool better but you do get sweat drip.

    Great XC Helmet

    • Familiarity: I've put it through the wringer

    Love this helmet for XC riding. It is so light, comfy, and airy that it feels like I'm not wearing anything.

    The Roc Loc 5 is awesome and easily adapts to headshape, hairstyle, and head coverings. You could for sure wear a bandana or skullcap under this helmet and still be comfortable. But then again I don't know why you would, it's just so well ventilated! I've definitely taken a few hard spills and it's showing no signs of damage.

    If you're looking for a go-to lightweight XC style helmet, this is it! You won't be disappointed.

    I'm a Large in most head apparel (I guess I'm filled with hot air) and this helmet was no different.

    Ben
    brabinowitz@backcountry.com
    801-746-7564

    Great XC Helmet

    Awesome and well vented XC helmet

    • Familiarity: I've used it once or twice and have initial impressions

    Rode with the helmet during an Israeli spring heatwave (+30 c). Awesome ventilation, immediately you feel the air flowing all over your head. Trumps previous specialized S-works helmets with good ventilation themselves. The giro isnt as lite as the S-works but also not as expensive. If your helmet needs to be safe and vented, this is definitely the helmet for you!
    Giro could learn from specialized when it comes to strap endings and length that are very long and dont really solve dangly straps. I personally dont find this a big deal as the rest of the design is very aesthetic.

    Great warm weather MTB Helmet

    • Familiarity: I've used it several times

    Living in FL, I prefer a helmet that has a lot of venting, is lightweight, and is comfortable. The Fathom does all three while still providing better protection than using a straight-up uber-light road helmet. The new wider straps and roc-loc retention make this thing very comfortable too.

    A couple other little features I like are the removable visor and the small rubber plugs you put in the visor holes on the helmet to give it more of a finished look with the visor off. Also dig the extra set of pads.