HJC RPHA 90S Carbon Modular Helmet.
Features
Carbon Fiber Outer Shell
- Aerodynamic shell structure for extreme performance at maximum speeds
- Improved peripheral vision helps to reduce eye strain and obstruct sunlight
- Optimized shell design for air flow ventilation system
SilverCool™ Interior
- Moisture-wicking and odor-free interior with advanced SilverCool™ antibacterial fabric
- Crown and cheek pads are removable and washable
- Glasses grooves accommodate riders with eyeglasses and sunglasses
Rapidfire™ Shield Replacement System
- Simple and secure shield ratchet system provides ultra-quick, tool-less removal and installation for efficient operation
Pin-Prepared HJ-29 Shield
- Optically superior 2D face shield provides 95% UV protection
- Center one-touch open/close locking system
- Superior automatic shield locking system with spring-controlled lever
- Enhanced shield dual lock system for high speed racing conditions
HJ-V9 Sunshield Visor System
- One-touch integrated anti-fog, anti-scratch black dark smoke sunshield
Sizing

Wrap a tape measure horizontally around your forehead. Select the helmet that is the closest fit to that size. A helmet should fit snug on your head. If it moves while wearing, it is too large. If it is painful to wear, it is too small.
| Size Chart | |||
| Size | CM: | Hat Size | Inches |
| S | 55-56 | 6 7/8 – 7 | 21 5/8 – 22 |
| M | 57-58 | 7 1/8 – 7 1/4 | 22 3/8 – 22 3/4 |
| L | 59-60 | 7 3/8 – 7 1/2 | 23 1/4 – 23 5/8 |
| XL | 61-62 | 7 5/8 – 7 3/4 | 24 – 24 3/8 |
| 2XL | 63-64 | 7 7/8 – 8 | 24 3/4 – 25 1/4 |














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