Giro Synthe Helmet

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  • Trustpilot review 9.4 out of 51.536 reviews

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Including Visor No No No No
Model Year 2017 2018 2017 / 2018 / 2019 / 2020 2019
Ventilation ★★★ ★★★ ★★☆ ★★★
Road Helmet Type All-round helmet All-round helmet Aero helmet All-round helmet
Helmet Size S / M / L / 51 - 55 cm S / M / L / 51 - 54 cm S / M / L / 51 - 55 cm S / M / L / XL / 48 - 56 cm
Colour Matte Black / Red / Matte Black / Matte Silver White / Black Blue / Brown / Grey / Green / Orange / White / Black / Red Matte Black / Black Ash Red / Black Red
84.80 99.99 From 105.00 79.00
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9.2 / 10 Average from 191 reviews | Write a review

9.2 / 10

191 reviews


  • Comfortable (7)
  • light weight (7)
  • Ventalation (5)
  • light (5)


  • Expensive (3)
  • Finish quality (1)
  • full price would be expensive (1)
  • None (1)

Most recent reviews

10 / 10

David, 7 June 2019

Good helmet

Good ventilation and aero features very comfortable


  • Ventilation
  • Aero

10 / 10

Matthew, 19 October 2018

Fantastic price - cheaper than crash replacement price

10 / 10

Stuart, 24 September 2018

Light and well ventilated

Pretty much as expected for the price.


  • Weight
  • Ventilation’s


  • Finish quality

10 / 10

Steven, 20 September 2018

perfect fit super light feel

Feels like a top end product i had an accident in this helmet and it saved me from serious head injury


  • quality product


  • full price would be expensive

10 / 10

Gary, 27 July 2018

Superb cycling helmet

Looks fantastic, really light weight, very comfortable and my head remained cool even on tough 100 mile route recently. Mantel company I can’t praise enough. Really easy purchase, informative emails kept me up to date with tracking and a final thank you message for using them. I will definitely use Mantel in the future for further cycling gear and would definitely recommend to others.


  • Light weight
  • Comfortable
  • Great price from Mantel
  • Keeps your head nice and cool


  • None

All specifications

Detailed product description

Roc Loc Air Fit system:
The Giro Roc Loc Air system is specially developed for the Giro Airo helmets. This new system ensures the helmet floats a little bit above your head. As a result there is a good airflow over the top of your head what ensures a good ventilation. Just like the Roc Loc®5 system the helmet can be easily fine-tuned. The tension around the head and the vertical position can be adjusted with one hand. With this Giro sets the new standards for ventilation and comfort.

Wind Tunnel Ventilation:
Giro helmets are developed using its Giro Wind Tunnel ventilation system. This system combines the active vents with the internal ventilation outlets. This combination ensures a cool, fresh air flow over and around the riders head, while forcing the heat and stale out. The renewing of these ''air channels'' turns out to be a huge success. The riders were real enthusiastic, they noticed the new ''air flow'' around their head, resulting in a better cooling!!

In-Mold Construction:
The In-Mold Construction combines a strong polycarbonate outer shell with
shock absorbing helmet padding. Thanks to its fusion process it is possible to sculpt a better ventilation system, so the In-Mold helmets are lighter and cooler than most traditional helmets.

X-static Padding:
Besides the fact they are comfortable The X-static pads ensure anti-microbial properties to keep your helmet longer clean . The pads are machine washable.

Additional information

• Wind Tunnel Aided Design for aerodynamic efficiency on the road
• Integrated Aero Mesh Panels (ideal storage place for your glasses)
• Super Lights X-Static pads
• New composition of EPS foam, lighter and stronger than before
• 19 vents; designed and shaped with wind tunnel technology
• Roc Loc Air system
• Weight: 233 g (size M) (weighed by Mantel Bikeparts)
• Sizes: S (51-55 cm), M (55-59 cm), L (59-63 cm)