HJC · C91 · Modular
The HJC C91 Prod Snow is a modular motorcycle helmet built for cold-weather riding, pairing a flip-up design with winter-focused comfort features. Offered in Prod MC-3H and Prod MC-5SF, it’s designed to be easy to live with on chilly days, including a chin bar mechanism intended to work smoothly even with gloved hands.
This C91 configuration uses an Advanced Polycarbonate Composite Shell and an Advanced Channeling Ventilation System to help manage airflow, while a built-in HJ-V5 integrated sun shield adds quick light control. Inside, the SuperCool interior uses moisture-wicking, anti-bacterial fabric, and the crown and cheek pads can be removed and washed. It is also Smart HJC ready for optional 10B or 20B Bluetooth systems (sold separately).
Comfort
The C91 Prod Snow combines a modular flip-up format with cold-ride details, including specialized insulation mentioned for winter comfort. The chin bar is designed for straightforward operation with gloved hands, helping riders manage stops and adjustments without fuss during colder conditions.
Shield
HJC’s Advanced Channeling Ventilation System (ACS) routes air from front intakes through the helmet and out the rear exhaust vents to help reduce heat buildup. For changing light, the HJ-V5 integrated sun shield can be adjusted internally, keeping the main shield in place while adding on-demand glare control.
Construction
A SuperCool interior liner and cheek pads use moisture-wicking, anti-bacterial fabric to support day-long comfort. The crown and cheek pads are removable and washable for easier upkeep. The C91 is also Smart HJC ready for optional 10B or 20B Bluetooth systems (sold separately).
Ventilation
The C91’s Advanced Channeling Ventilation System is designed to move air efficiently through the helmet by bringing cool air in through the front and pushing warm air out through rear exhaust vents. HJC describes this as helping keep the ride more comfortable across conditions and helping reduce fogging by managing heat and humidity inside the helmet. Large top vents work with deep EPS channels to guide airflow where it’s needed.
Shield
This helmet is listed as being available with an HJ-17 electric or dual lens shield, and it uses HJC’s RapidFire shield replacement system for straightforward shield changes. An HJ-V5 integrated sun shield sits inside the helmet and is adjustable, letting riders tune light control without swapping the outer shield. (Pinlock is not stated for this model on the provided data.)
Communication
The C91 is Smart HJC ready, meaning it’s designed to accept HJC’s 10B or 20B Bluetooth systems (sold separately). This setup supports adding communication features such as hands-free connectivity for conversation, navigation prompts, or music when paired with the appropriate system. Since the communication unit is optional, riders can choose to run the helmet as-is or add electronics later.
| Certifications | DOT Approved |
|---|
| removable breath guard |
| chin curtain |
Included with this helmet as listed by HJC.
C91 Helmet Manual (PDF) HJC Helmet Size Chart
Provided by HJC. Opens in a new tab.
