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Alpinestars SM5 Rayon Helmets
The all-new SM5 helmet is the result of more than five years of intensive study, development and testing. Based on Alpinestars’ five decades of protection development, we scrutinized every possible aspect to engineer a helmet that is safer and more thoughtfully designed than anything else.
Features
HIPRO HIGH IMPACT THERMO PARAMETRIC SHELL
- A polymer blend enhanced by varying degrees of thickness engineered to provide an optimum combination between impact protection and weight.
PATENTED VISOR RELEASE SYSTEM
- Allows visor to release in a crash with the correct pre-determined amount of force regardless of angle of impact
FIVE DENSITY EPS LINER
- The right density in the right area for impact absorbsion
HYDRATION ROUTING
- Integrated cheek pads loops hold hydration hose
INTEGRATED COLLARBONE PROTECTION
- Engineered raised & padded area reduces forces transmitted to the collarbone
26MM WIDE CHIN STRAP
- Wider than certification requirements – for safety and comfort
TANGENTIAL IMPACT PROTECTION
- Allows visor to release in a crash with the correct pre-determined amount of force regardless of angle of impact
FULL VENTILATION SYSTEM
- Visor directs air into ports for added breathability
ERS-EMERGENCY RELEASE SYSTEM*
- Safely and easily remove cheekpads while the helmet is still on
Sizing Information
Below is a size chart provided by Alpinestars for this product.
Helmet Size | Head Measurement (inches) | Head Measurement (cm) |
---|---|---|
XS | 20.8 to 21.2 | 53 to 54 |
Small | 21.6 to 22 | 55 to 56 |
Medium | 22.4 to 22.8 | 57 to 58 |
Large | 23.2 to 23.6 | 59 to 60 |
XL | 24 to 24.4 | 61 to 62 |
XXL | 24.8 to 25.2 | 63 to 64 |
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