HJC RPHA 1N Red Bull Austin GP Helmet.
Features:
- P.I.M. Plus (Premium Integrated Matrix Plus) reinforcement materials, including carbon and carbon-glass hybrid fabric
- Aerodynamic shell design
- “ACS” Advanced Channeling Ventilation System with 5 intake and 4 exhaust vents
- Moisture-wicking and anti-bacterial SilverCool liner and cheek pads
- Glasses grooves inside to accommodate eyeglasses and sunglasses
- Included clear HJ-35 face shield is pinlock-ready, tear-off ready and anti-scratch coated
- Pinlock lens, tear-offs and clear extended aero-spoiler included
- Easy attachment system allows for easy face shield replacement
- Crown and cheek pads are removable and washable
- Speaker pockets for Bluetooth communication
- Double D-ring closure
- Breath deflector and chin curtain included
- Cheek pads have emergency release system for quick and safe removal
- Meets or exceeds DOT FMVSS 218, ECE 22.06 approved
- FIM certified
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 |
| 2XS | 51-52 | 6 3/8 - 6 1/2 | 20 - 20 1/2 |
| XS | 53-54 | 6 5/8 - 6 3/4 | 20 7/8 - 21 1/4 |
| S | 55-56 | 6 7/8 - 7 | 21 5/8 - 22 |
| M | 57-58 | 7 1/8 - 7 1/4 | 22 1/2 - 22 7/8 |
| 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 |
| 3XL | 65-66 | 8 1/8 - 8 1/4 | 25 5/8 - 26 |
| 4XL | 67-68 | 8 3/8 - 8 1/2 | 26 3/8 - 26 3/4 |
| 5XL | 69-70 | 8 3/4 - 8 3/4 | 27 1/4 - 27 5/8 |
