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Giro Synthe MIPS Helmet


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The Synthe MIPS is Giro’s premium and flagship helmet, designed to be the perfect compromise between aerodynamic performance, weight, and ventilation, equipping the professional and impassioned rider with the marginal gains required to distance themselves from their adversaries.

A thing of elegant sloping beauty, the Synthe MIPS features wind tunnel aided design to assure ultimate efficiency and drafting from multiple head angles while out in real world environments. The incorporation of integrated Aero Mesh Panels and 19 vents with internal channeling make this perhaps one of the best cooling helmets ever made, perfect for high-intensity efforts and high-end performance.

With function as well as aesthetics a key concern, this helmet featuring MIPS torsional dampening technology is perhaps the safest found in the pro-peloton, protecting from radial impacts as well as lateral impacts. With built-in docking ports for your sunglasses, the Giro Synth MIPS is perfectly conceived for the practicalities of road racing. Constructed from an In-Mold Polycarbonate Shell with EPS liner, the Giro Synthe MIPS is strong without compromise on weight.

To this end, the rear Roc Loc Air fit system has been especially slimmed down to save as much weight as possible while an X-static Padding set makes sure that this helmet is comfortable as it is eye-catching out on the road.

Giro Synthe MIPS Helmet

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Size Chart

Product Review Summary

Overall Rating

5.0 out of 5

0 Rider Reviews

Purchase History

  • 16 riders
    bought this item

  • 3 riders
    want this item

Product features
  • Open Road
In Detail
  • Weight: 254g (Medium)
  • Wind Tunnel Aided Design
  • In-Mold Polycarbonate Shell with EPS liner
  • Eyewear Docking ports
  • 19 Vents with internal channelling
  • Featherweight Webbing with Slimline Buckle
  • Integrated Aero Mesh Panels
  • Roc Loc Air Fit System
  • MIPS equipped
  • The pro cyclist’s choice
  • Precision and high performance protection with MIPS
  • Lightweight and ultra cooling
  • Air dry
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Size help and product measurements
Giro Synthe MIPS Helmet
Size Chart
This is the brand’s general size chart, use this to get an idea of which size is right for you.
  39 5.5 6.5
  39.5 6 7
  40 6 7
  40.5 6.5 7.5
  41 7 8
  41.5 7.5 8.5
  42 7.5 8.5
  42.5 8 9
  43 8.5 9.5
  43.5 9 10
  44 9.5 10.5
  44.5 9.5 10.5
  45 10 11
  46 11 12
  46.5 / 47 11.5 12.5
  48 12.5 13.5
Shoes - WomenEUUKUS
  36 3 5
  37 3.5 5.5
  37.5 4 6
  38 4.5 6.5
  39 5.5 7.5
  39.5 6 8
  40 6 8
  40.5 6.5 8.5
  41 7 9
  41.5 7.5 9.5
  42 8 10
  42.5 8 10
  43 8.5 20.5
EU 36-39 40-42 43-45 46-48
HELMETSSMLUni Size - adultUni Size - XL
head circumference (cm) 51-55 55-59 59-63 54-61 58-65
chest (inches) 35-36.5 37-38.5 39-40.5 41-42.5 43-45
sleeve (inches) 14 15 15.5 16.5 17.5
waist (inches) 29.5-30.5 31.5-32.5 33.5-34.5 35.5-36.5 37.5-38.5
Apparel - WomenXSSMLXL
bust (inches) 32-33 34-35 36-37 38-39 39.5
natural waist (inches) 25-26 26.5-28 28.5-30 30.5-32 33
hip (inches) 35-36 37-38 39-40 41-42 43
hand circumference (cm) 17.8-20.3 20.3-22.9 22.9-24.8 24.8-26.7
hand length (cm) 17.5-18 18-18.8 18.9-19.9 20-21
For an accurate glove size, please measure around your palm, placing it flat and making sure to exclude the thumb for the circumference. Finally, measure from the start of the hand to the tip of the middle finger to get the length.
hand circumference (cm) 16.5-18.4 18.4-20.3 20.3-22.2
hand length (cm) 15.3-16cm 16-16.9 17-17.7
For an accurate glove size, please measure around your palm, placing it flat and making sure to exclude the thumb for the circumference. Finally, measure from the start of the hand to the tip of the middle finger to get the length.

Where is my order sent from?

All orders are packed & shipped from our HQ in the UK on the same day you order, if in stock and ordered before 3pm GMT Monday to Friday.


We offer both mail and express ship options courtesy of Royal Mail and UPS respectively. Below you will find a rundown of default delivery costs, but to see your personalised shipping cost, please visit the delivery section of checkout when you have added some items to your bag. Please note that orders of bulky items will attract a surcharge.

 Royal MailExpress
UK £2 standard, or £3.50 for Tracked 48 DPD Next Day (Mon-Fri), £5.50
N. AMERICA Up to 10 working days, from $8 2 day, from $15
EUROPE Up to 5 working days, from €5 Next day, from €12
SCANDINAVIA Up to 5 working days, from €5 Next day, from €12
AUSTRALIA / NZ Up to 10 working days, from $10 3 day, from $25
JAPAN Up to 10 working days, from ¥700 3 day, from ¥1800
REST OF WORLD Up to 14 working days, from $10 3 day, from £25

60 Day Returns

Returns are really simple. We include a pre-paid returns address label inside every package, so if you would like to return something to us, just make sure to send it back up to 60 days after you have received it. Please note that we will retain £2 from your refunded amount to cover the cost of the return service.

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