The HJC RPHA 31 Dereen MC5SF is a premium large open-face motorcycle helmet designed for riders who want dependable protection, refined aerodynamics, and everyday comfort. Its Premium Integrated Matrix (PIM) Evo shell combines carbon-aramid hybrid and natural fiber reinforcement materials to provide enhanced shock resistance while maintaining a lightweight, comfortable design. The elongated shell and extended chin EPS create an encompassing full face-level fit for improved coverage and vision control.
Engineered through wind-tunnel testing, the HJC RPHA 31 helps reduce air resistance, wind turbulence, and riding noise for a smoother experience at city and highway speeds. The helmet uses a full front-to-back ventilation system with two intake vents and four exhaust vents to help manage airflow. Its integrated smoke-tinted sun visor features an anti-fog coating and a bottom-positioned operating system for quick deployment. Multi-step adjustment allows the visor to move up to approximately 3/8 inch closer to the face for personalized shading and comfort.
The included Pinlock® 120XLT® DKS467-ready HJ-39 shield provides 99% UV protection and has an anti-scratch coating. The shield holder helps reduce noise and aerodynamic drag while keeping the visor securely in place. Inside, the RPHA Premium Fit interior uses advanced antibacterial fabric with moisture-wicking and quick-drying properties. The removable, washable crown and cheek pads, along with interchangeable cheek pads across helmet sizes, support a precise custom fit. Reflective materials add visibility in low-light conditions. The helmet is also compatible with second-generation SMART HJC Bluetooth communication systems, sold separately.
Fitment: The HJC RPHA 31 Dereen MC5SF is sized Large and is intended for motorcycle and powersports riders seeking an open-face helmet with enhanced coverage, integrated sun protection, ventilation, and communication-system compatibility. Manufacturer and vendor part number: JA19NUS62S5V.
Features:
- Size: Large
- Model: RPHA 31 Dereen MC5SF
- Brand: HJC
- Manufacturer part number: JA19NUS62S5V
- Vendor part number: JA19NUS62S5V
- Shell construction: Premium Integrated Matrix (PIM) Evo shell with carbon-aramid hybrid and natural fiber reinforcement
- Protection: Multi-density EPS and extended chin EPS provide enhanced impact protection and full face-level coverage
- Aerodynamics: Wind-tunnel-developed shell reduces air resistance, turbulence, and riding noise
- Ventilation: Two intake vents and four exhaust vents support front-to-back airflow
- Sun visor: Integrated smoke-tinted, anti-fog sun visor with multi-step adjustment and bottom-positioned operation
- Shield: Pinlock® 120XLT® DKS467-ready HJ-39 shield with 99% UV protection and anti-scratch coating
- Interior: Antibacterial, moisture-wicking, quick-drying premium fit fabric
- Comfort: Removable and washable crown and cheek pads with interchangeable cheek-pad options
- Visibility: Reflective material helps improve rider visibility in low-light conditions
- Communication compatibility: Accepts second-generation SMART HJC Bluetooth communication systems, sold separately