The HJC RPHA 31 Dereen MC5SF is an open-face helmet designed with a Premium Integrated Matrix (PIM) Evo shell and multi-density EPS to support shock-resistant performance, comfort, and lightness. Its aerodynamic shell design helps reduce air resistance and provide stability at high speed, while wind tunnel development helps create a quiet, refined riding experience.

The helmet features a Pinlock 120XLT DKS467-ready HJ-39 shield with anti-scratch coating and 99% UV protection. An integrated smoke-tinted sun visor uses an anti-fog coating for clear viewing and deploys through the bottom-positioned operating system. Multi-step adjustment allows the sun visor to move up to 10 mm closer to the face for personalized shading and comfort.

Full front-to-back airflow is provided by two intakes and four exhausts. The shield holder is designed to reduce noise and drag forces while holding the visor securely. The RPHA Premium Fit interior uses advanced antibacterial fabric with moisture-wicking and quick-drying properties. Removable, washable crown and cheek pads, 3D-contour cheek pads, interchangeable cheek pads across all sizes, and reflective material support comfort, fit customization, and visibility.

The RPHA 31 accommodates second-generation SMART HJC Bluetooth communication systems, sold separately. Its elongated shell and extended chin EPS are designed to provide an encompassing full face-level fit. This HJC helmet is identified by part number JA19NUS82S5V and is offered in size 2XL.

Features:

• PIM Evo Shell: Uses Premium Integrated Matrix reinforcement materials, including Carbon-Aramid Hybrid and Natural Fiber, for enhanced shock-resistant performance, comfort, and lightness.
• Aerodynamic Design: Shell shape helps reduce air resistance and provide stability at high speed.
• Ventilation: Full front-to-back airflow with 2 intakes and 4 exhausts.
• HJ-39 Shield: Pinlock 120XLT DKS467-ready shield with anti-scratch coating and 99% UV protection.
• Integrated Sun Visor: Smoke-tinted, anti-fog sun visor deploys through a bottom-positioned operating system.
• Sun Visor Adjustment: Multi-step adjustment allows the visor to move up to 10 mm closer to the face.
• Shield Holder: Helps reduce noise and drag forces while holding the visor securely.
• Premium Fit Interior: Advanced antibacterial fabric provides moisture-wicking and quick-drying performance.
• Removable Pads: Crown and cheek pads are removable and washable.
• Customizable Fit: 3D-contour cheek pads and interchangeable cheek pads across all sizes support fit adjustment.
• Reflective Material: Adds reflective detailing for safety.
• Communication System Ready: Accommodates second-generation SMART HJC Bluetooth communication systems, sold separately.
• Fit Design: Elongated shell and extended chin EPS provide an encompassing full face-level fit.