# RPHA 31 Dereen Helmet MC21

-   The RPHA 31 open-face model benefits from the Premium Integrated Matrix (PIM) Evo shell and multi-density EPS, excelling in augmenting shock resistance and furnishing optimal protection
-   **Methodically designed,** it orchestrates a serenely quiet and aerodynamically refined ride, an outcome achieved through meticulous wind tunnel trials
-   The sun-visor-equipped RPHA 31 effectively diminishes noise levels and mitigates wind turbulence
-   **Seamlessly aligning with technological progress,** the RPHA 31 accommodates the second-generation SMART HJC Bluetooth communication systems allowing an undistracted focus on the road ahead (sold separately)
-   **Pinlock® 120XLT® DKS467 Ready HJ-39 Shield:** Provides 99% UV protection, anti-scratch coated
-   PIM EVO Shell
-   **Premium integrated matrix / P.I.M EVO:** Reinforcement materials including Carbon-Aramid Hybrid and Natural Fiber, provide enhanced Shock-Resistant performance, more comfort, and lightness of the helmet

The HJC RPHA 31 Dereen Helmet is an off-road and dual-sport full-face built on HJC's premium RPHA platform, designed for riders who demand RPHA-grade protection beyond the pavement. The carbon fiber shell is [DOT](https://www.nhtsa.gov/motorcycle-safety/choose-right-motorcycle-helmet) and [ECE 22.06](https://sharp.dft.gov.uk/frequently-asked-questions/) certified and built with an aerodynamic peak, aggressive ventilation, and a goggle-friendly eye port purpose-designed for off-road use. The RPHA Premium interior is moisture-wicking, antibacterial, and fully removable for washing after dusty or muddy sessions. Pinlock-prepared face shield for clear vision in changing conditions. At The Helmet Shop, the RPHA 31 is the dual-sport full-face for serious riders who want RPHA-level protection on every terrain they explore.

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## Details

- **Price:** 549.99 USD
- **Vendor:** HJC
- **Type:** Helmets - Open Face

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| XS | 549.99 USD | In stock |
| S | 549.99 USD | In stock |
| M | 549.99 USD | In stock |
| L | 549.99 USD | In stock |
| XL | 549.99 USD | In stock |
| XXL | 549.99 USD | In stock |

## Images

- RPHA 31 Dereen Helmet

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> Source: [The Helmet Shop](https://helmetshop.com/products/rpha-31-dereen-helmet-mc21)
> Updated: 2026-06-03