Giro Atmos Helmet
The Giro Atmos is one of those products that just seems to stay at the top. Riders the world over consider the Atmos to be the best possible mix of weight, technology and ventilation, and have thought this for quite some time. When you have a close look at the helmet it's easy to see why it has been a favourite amongst cyclist for so long. The 26 vents that have internal channelling are reinforced with a composite roll cage that not only gives the helmet a high tech look, also happens to make the helmet very strong. The internal channels do actually work, keeping your head cool when things out on the bike heat up. You will also notice when trying on the Giro Atmos that it has an amazing amount of adjustment, more than just the couple of adjustments you normally get. Not only can you adjust the size quickly and easily, you can also adjust the helmet vertically in three increments which along with the other standard adjustments that give the Atmos a custom fit.
 
From Giro:

"Atmos continues to set the standard for high performance, matchless style, and comfortable fit. Its low profile silhouette, 26 Wind Tunnel vents, and benchmark in-mold Roll Cage make it a top choice for road, ‘cross, and XC riders alike".

Wind Tunnel Ventilation: Giro helmets are developed utilizing their proprietary Wind Tunnel™ ventilation system, which combines active vents with internal exhaust channels that thrust cool, fresh air over and around the riders head-while forcing heat and stale air out. This significant increase in air channelling makes a difference that you will immediately feel and appreciate.

In-mold: Giro's in-mold construction process fuses the helmet’s outer shell with its impact-absorbing EPS liner during the molding process, making the liner literally a part of the helmet. This fusion process reinforces areas around vents and ribs, creating a one-piece ‘exoskeleton’ that allows the helmet to be lighter, more durable, and better ventilated than traditional designs.

Roll Cage: Roll Cage reinforcement is a tough web of DuPont ® Nylon® molded inside a helmet’s EPS foam liner. It provides an extra measure of strength and integrity that you’ll never notice…unless you need it.

ROC LOC 5: After more than two-years of development, Giro introduced Roc Loc 5. This groundbreaking fit system provides an entirely unique user experience with an unmatched level of comfort, stability, adjustability and weight savings. With Roc Loc 5, you can easily dial-in both fit tension and adjust vertical position with a single hand. Just twist the dial for a tighter feel on rough terrain, then back it off a notch and relax across the flats or a warm climb. Even with these remarkable features, Roc Loc 5 is still nearly 40-percent lighter than its popular predecessor, Roc Loc 4.

The Giro Atmos features:

• For Road use
• Internal roll cage reinforcement
• EPS Foam Core
• 26 Vents with Wind Tunnel Ventilation
• Roc Loc 5 adjustment system
• Sizes: Small (51-55cm), Medium (55-59cm) and Large (59-63cm)
• Weight: 269 grams

The Giro Atmos continues its legacy as the benchmark in high performance helmets.