HJC

HJC F31

Item # 0838-0135-06

$259.99

DOT

Color: Semi-Flat Black

Size

HJC

Helmet Size Chart

Measure around your head about 1 inch (2.5 cm) above your eyebrows, at the largest point, and take the largest reading. Match the centimeters, not your usual letter size, Suomy and NEXX run about a size small, so if you're between sizes, size up.

Size	Head size (cm)	(in)
2XS	52-53	20.5-20.9
XS	54-55	21.3-21.7
S	55-56	21.7-22.0
M	57-58	22.4-22.8
L	58-59	22.8-23.2
XL	60-61	23.6-24.0
2XL	62-63	24.4-24.8
3XL	64-65	25.2-25.6

A few models vary by about a centimeter. Check this model's own listing if you're on a size line. Full fit & sizing guide →

In stock, ready to ship

Not sure of your size? Read the Helmet Fit & Sizing Guide →

The F31 combines lightweight comfort, advanced ventilation, and touring-focused functionality in a refined fiberglass design. Its Advanced Fiberglass Composite Shell offers a superior fit and comfortable wear, while the ACS ventilation system channels airflow from front to back to help remove heat and humidity. A Pinlock-ready HJ-43 visor with 99% UV protection, anti-scratch coating, and improved sealing enhances visibility and convenience, while the dynamic multi-step sun shield provides a more optimized riding position. Moisture-wicking interior materials, removable and washable pads, and SMART HJC Bluetooth compatibility further enhance everyday comfort and versatility.

Specifications

AFC SHELL Crafted for lightweight performance and lasting durability, the APC(Advanced Fiberglass Composite) Shell delivers a refined balance of comfort, strength, and everyday protection.
ACS Advanced Channeling Ventilation System: Designed with an aerodynamic shell and optimized vent layout, the F31 enhances airflow for a cooler and more refined riding experience. Its three intake vents and single exhaust vent work together to promote efficient ventilation and lasting comfort on the road.
DMS SUN SHIELD Dynamic Multi-Step Sun shield lets you fine-tune the visor to the optimal position. It is anti-fog coated and designed to be distortion-free for clear, comfortable vision.
LOCKING SYSTEM Engineered with a strengthened locking system, the design enhances protection while creating a slimmer, sleeker front profile and a more secure fit.
BOOM MIC COVER The integrated SMART HJC boom mic cover contributes to a cleaner, more refined design while enabling seamless integration with SMART HJC communication systems.
SMART HJC 2ⁿᵈ GEN. Engineered in collaboration with SENA and tailored exclusively for HJC helmets, the SMART HJC 2nd generation premium Bluetooth communication system features a fully integrated all-in-one design that enhances weight balance and aerodynamic performance for an elevated riding experience. All SMART HJC devices are sold separately.
3 YEARS WARRANTY Warranty coverage applies to manufacturing defects for up to 3 years from the date of purchase or 5 years from the date of manufacture, whichever comes first.

Certifications: DOT