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Synthe MIPS II Helmet

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Backorder: This item is currently not in stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

The Synthe MIPS II is an icon, updated to be cooler and more comfortable than ever before.

The compact design slips through the air with ease yet offers impressive cooling power in a light-yet durable design that's been a rider favorite for years.

It's packed with our best features, including the Roc Loc 5 Air fit system with 2-way fit tuning and integrated MIPS; (the Multi-directional Impact Protection System), the market-leading brain protection system designed to redirect rotational forces away from the brain and provide more protection in certain impacts.


  • Featherweight Webbing with Slimline buckle
  • Roll Cage internal reinforcement
  • Ponytail compatible
  • MIPS-Equipped
  • In-mold polycarbonate shell with EPS liner, Thermoformed SL reinforcement
  • Roc Loc 5 Fit System
  • 26 Wind Tunnel vents with internal channeling
  • Compatible with Roc Loc 5 LED (sold separately)

  • Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for US customers if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.

    B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    This product is NOT Eligible for VIP Points.

    Giro Synthe MIPS II Helmet
    A newer version of this product is available.
    Our Price $199.95
    Head Circumference20"-21¾"21¾"-23¼"23¼"-24¾"   

    Construction: In-Mold polycarbonate shell 


    Liner: EPS impact liner 


    Impact Foam: Thermoformed SL reinforcement 


    Ventilation: 26 vents 


    Safety: MIPS Brain Protection System 


    Certification:  U.S.: CPSC BICYCLE FOR AGES 5 E.U.: CE EN1078 


    Discipline: Road 

    Mfg PartNum: 7140168 

    Mfg PartNum: 7140167 

    Mfg PartNum: 7140166 

    Mfg PartNum: 7130722 

    Mfg PartNum: 7130731 

    Matte Black - Small

    Mfg PartNum: 7130695 

    Matte Black - Medium

    Mfg PartNum: 7130696 

    Matte Black - Large

    Mfg PartNum: 7130697 

    Matte White/Silver - Small

    Mfg PartNum: 7130740 

    Matte White/Silver - Medium

    Mfg PartNum: 7130741 

    Matte White/Silver - Large

    Mfg PartNum: 7130742 

    Matte Black/Bright Red - Small

    Mfg PartNum: 7130767 

    Matte Black/Bright Red - Medium

    Mfg PartNum: 7130768 

    Matte Black/Bright Red - Large

    Mfg PartNum: 7130769 

    Matte Warm Black - Medium

    Mfg PartNum: 7130732 

    Matte Warm Black - Large

    Mfg PartNum: 7130733 

    Matte Harbor Blue - Small

    Mfg PartNum: 7140169 

    Matte Harbor Blue - Medium

    Mfg PartNum: 7140170 

    Matte Harbor Blue - Large

    Mfg PartNum: 7140171 

    Matte Black Underground - Small

    Mfg PartNum: 7140166 

    Matte Black Underground - Medium

    Mfg PartNum: 7140167 

    Matte Black Underground - Large

    Mfg PartNum: 7140168 

    Mfg Warranty: 12 Mo. Parts & Labor

    Warranty URL: https://www.giro.com/warranty.html

    Ordered by Most Relevant First
    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    Great helmut provides protection while being airy enough for rides on hot summer days.
    by DZ-Sactown
    Daily Commuter
    Sacramento, CA

    Helmut is comfortable. I measure about a 7-1/2 hat size and the large size helmut works well. Fairly lightweight and stays in place during rides. Haven't crashed yet with this one on but my old Giro helmut absorbed a crash and being beaned by an errant golf drive :-) so anticipate this one will do the job as well.

    Reviewed 8/29/2022
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    Good helmet! Not life-changing
    by Anonymous

    I upgraded from a Giro Foray to a Synthe, expecting it to be noticeably more comfortable. It's plenty comfortable, but I can't say it feels significantly different than a cheaper helmet. But it looks great!

    Reviewed 6/18/2022
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    Fantastic Helmet and great for BIG heads
    by Mark
    Binghamton NY

    It's light and comfortable. Great ventilation and easy to adjust. Trust the sizes-- I only know 2 people with heads bigger than mine. I measured my head and it was within the L range not XL as I expected. I thought there was a mistake, but since there wasn't an XL, I bought the large. It fits fine. If you have a king size cranium, buy this helmet-- it will fit.

    Reviewed 5/2/2022
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    Great update to a proven helmet design
    by c.murder
    Cycling Enthusiast
    SD, CA

    As a long-time Giro helmet user, the Synthe MIPS II is the best I've used to date. Ultra-light, super-ventilated, and the added safety of MIPS II? What's not to like!

    If you're too frugal - like me - to fork out the dough for the latest and greatest Giro helmet used by the PROs, this former PRO level lid is an incredible value.

    Reviewed 4/27/2022
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    Product performance is as advertised
    by SeattleRadfahrer
    Cycling Enthusiast

    Lightweight, cool, and a comfortable fit as advertised. Worth the price for a nice design built around MIPS safety features. No issues whatsoever for me on long rides.

    Reviewed 7/15/2022
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    Love ? it so much
    by Anonymous
    Cycling Enthusiast
    2 of 2 customers found this review helpful.

    This is my 3rd Giro Synthe; I bought it to save in case they are discontinued. This is the only helmet I will wear; it happens to fit my head well. It does not impinge on my neck. And it definitely saved me from potentially serious head injury when I wrecked recently. The helmet was totalled, but saved my head!

    Reviewed 12/23/2021
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    Great helmet and good price
    by Brian
    Cycling Enthusiast
    Pacific Northwest
    1 of 1 customers found this review helpful.

    Helmets keep advancing and that leaves better deals on the best helmets of yesterday. Keeps me cool and doesn't look bulky on my head.

    Reviewed 4/20/2022
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    Great price for a quality helmet
    by Anonymous

    It's comfortable, light, and has great safety features.

    Reviewed 2/18/2022
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    by Anonymous
    1 of 1 customers found this review helpful.

    Great helmet. I had several crashes these helmets stopped me from having a concussion

    Reviewed 11/15/2021
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