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  • Giro Prolight Bike Helmet, White/Silver, Medium
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Giro Prolight Bike Helmet

by Giro

Price: $119.99 - $200.00
Sale: Lower price available on select options
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White/Silver
  • Ultra-lightweight, race-oriented helmet with in-molded solid construction for increased ventilation and strength
  • Upper and lower in-mold polycarbonate hardbodies with EPS liner and X-Static padding
  • Roc Loc SL self-adjusting ultra-light fit system with three horizontal belt positions
  • Featherweight webbing with fixed position over-molded separator; Air Loc buckle
  • 25 Wind Tunnel vents and internal channeling keeps air flowing; one-year warranty
Need help buying the perfect bike helmet? Visit our Bike Helmet Buying Guide for complete information on bike helmet types and how to measure for the right bike helmet size.

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Frequently Bought Together

Giro Prolight Bike Helmet + Topeak Alien II 26-Function Bicycle Tool
Price for both: $144.40

These items are shipped from and sold by different sellers.

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Product Description

Amazon.com

The Prolight Bike Helmet from Giro is designed and built to provide the lightest weight head protection available to bikers. This race-optimized helmet utilizes lightweight technologies and materials--top-to-bottom--from the 100 percent in-molded construction to the featherweight, Italian-made webbing straps. In order to provide the impact protection that fast, road racing requires, the Prolight is constructed with upper and lower in-mold hardbodies for a full coverage shell. Meanwhile, Giro's signature Wind Tunnel Ventilation with 25 vents allows cool air in, while forcing the warm air out, to provide the ventilation that bikers need to stay comfortable. Finally, thanks to a combination of Super Fit Engineering and the Roc Loc SL self-adjusting ultra-light fit system, the Prolight provides a custom-fit for just about any one.

Key Features:

  • In-Mold Construction: fuses a polycarbonate outer shell with the helmet's impact-absorbing EPS foam liner--making the liner literally a part of the helmet. This process reinforces areas around vents and ribs, creating a one-piece exoskeleton that makes the helmet lighter, more durable, and better ventilated.
  • Wind Tunnel Ventilation: Giro's proprietary Wind Tunnel ventilation system combines active vents with internal exhaust channels designed to thrust cool, fresh air over and around the rider's head, while forcing heat and stale air out.
  • Roc Loc SL Fit System: Roc Loc SL self-adjusts to provide a secure fit with one quick adjustment of the webbing system. The webbing system is created with supple and lightweight, Italian-made webbing material.
  • Super Fit Engineering: Giro's proprietary three-size Super Fit system is based on human scale factors data collected in Giro's 20 years of helmet crafting. The resulting Super Fit helmets are designed to provide a custom-feel fit for 98 percent of the world's population.
  • X-Static Padding: X-Static pads provide comfort and anti-microbial properties to help keep the helmet fresher for longer. The pads are also machine washable.

Size Specifications:

  • Small: 51 to 55 centimeter head circumference
  • Medium: 55 to 59 centimeters head circumference
  • Large: 59 to 63 centimeters head circumference

Product Description

New for 2010 - Simply the lightest CPSC race helmet in the world, named after the helmet which changed the game. Upper and lower in-mold hardbodies for a full coverage shell Wind Tunnel Ventilation - 25 vents with fully optimized channeling New Roc Loc SL self-adjusting ultra-light fit system.

Product Details

  • Shipping Weight: 1 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B002LSVJLI
  • Item model number: 2019
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (32 customer reviews)
  • Amazon Best Sellers Rank: #19,803 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Discontinued by manufacturer: Yes
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Customer Questions & Answers

Customer Reviews

It fits on my head and stays put.
Curtis J. Koch
Perfect for people who like myself, don't really want to wear a helmet in the first place.
Lisa
This helmet is very comfortable and light.
Dixiedogg

Most Helpful Customer Reviews

24 of 24 people found the following review helpful By Hengyi Hu on March 4, 2011
This is my second Giro helmet - I also have an atmos that I wear regularly.

First off, the helmet is crazy light. If you're into saving weight, then this is the helmet for you. It literally feels like nothing on your head after a little while.

In the month that I've had this helmet, I was never able to get it to fit correctly. The retention system (or lack of) does not let you adjust the tightness so there ends up being two pressure points around your temple. I found that cutting the padding near your temple, and leaving only the ones in the front of the helmet, helps with this issue. Also, when I tried the helmet at the store, even though I have a 22" head, a recommended "medium" size helmet was way too tight. A large was also fairly tight, but much more bearable. The helmet buckle does feel cheap, but I'm guessing it is that way to save weight. But even that is forgivable.

I really wished there was a way to adjust the rear elastic "giro" band that pushes your head forward into the helmet that creates these pressure points.
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13 of 16 people found the following review helpful By Chris R. Tache on August 17, 2010
Color Name: Black/CarbonSize Name: Medium
For the amount of money I spent on this helmet, I expected a much more bulletproof chin strap system. The one I had on the last less expensive giro helmet was much better. Yes, this one is light, but there are virtually no micro adjustments for strap.It either fits TOO Tight, or TOO LOOSE. I assume TOO Tight is better, but it often borders on ice cream headache when warm out.It doesn't give me much confidence even when this tight. I should have purchased the well proven and just as expensive Ionis.I didn't research the strap enough to know what I wasn't getting in the Giro Prolight. Don't make the same error i did. If you're a serious rider, or racer, I would worry about going down in this helmet. The strap would fail.
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5 of 5 people found the following review helpful By Lisa on October 18, 2010
Color Name: Black/CarbonSize Name: Medium Verified Purchase
The helmet performs exactly as described. It's extremely lightweight. Perfect for people who like myself, don't really want to wear a helmet in the first place. The many vents allow great airflow. And I can usually scratch my head without having to take the helmet off.
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3 of 3 people found the following review helpful By Daniel Lipsher on December 19, 2012
Verified Purchase
When I took a bad fall and broke my wrist (the bike is OK, thank goodness), I also hit my head, hard. The Giro Prolight did exactly what it was designed to do — absorbed the impact and cracked — while my head didn't sustain so much as a scratch. I initially bought the Prolight on Amazon because it was the lightest helmet on the market, and I immediately ordered a second from Amazon when I found one listed at half price from Bikewagon. The seller immediately shipped my order Priority Mail, and I received it in just three business days. Great price, outstanding service. I will purchase from Bikewagon any time I get the chance.

Now if only my wrist would heal so I can get back on the bike.
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2 of 2 people found the following review helpful By bread on December 4, 2011
Color Name: Red/BlackSize Name: Small Verified Purchase
true to their word, this helmet is very light. however, this is achieved by replacing the usual adjustable rear strap and side buckles with fixed connections and elastic (instead of the usual webbing) straps. i bought this replace a friend's crash damaged giro ionos (giro's crash replacement policy isn't exactly a great deal), but she decided that the ionos did it's job quite well and this prolight seemed too different, functionally. so i returned this and she got another ionos...
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4 of 5 people found the following review helpful By l2 TOP 1000 REVIEWER on November 8, 2011
This helmet is very light compared to others in the same price range (about 30% lighter than average). When you look inside the helmet, you can tell how they did it. There is very little padding inside. The neck straps are thinner and less adjustable than on other helmets. The harness in the back is much simpler than what Giro usually uses. And the sizing runs small. My size 7.5 (hat size) head fits in to other size large Giro helmets with room to spare, but barely squeezes in to this one.

If you're a competitive bicyclist and every ounce counts, then this helmet may be an easy way for you to drop a few ounces. I think most recreational cyclists would rather have a more comfortable helmet, though.
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1 of 1 people found the following review helpful By DS Max on June 19, 2013
Color Name: Red/BlackSize Name: Medium Verified Purchase
I've already had a minor wreck on my triathlon bike and the helmet securely protected my head from getting banged up. It looks great and gets compliments wherever I go, is light, aero shaped, and definitely functional. It has my stamp of approval, I highly recommend the Giro Prolight , despite the high price tag.
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1 of 1 people found the following review helpful By Ravenrider on July 13, 2012
Color Name: Red/BlackSize Name: Large Verified Purchase
The moment I tried it on was not digging the strap system used on this helmet. Straps were not allowing for helmet to fit snug on my head. Other than that the helmet was very sharp looking and light but I did not wear it at all for a ride. I just simply sent it back. It may fit just fine for other riders but was just not my style.
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