Product Details
Size Guide
| XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|
| 53-54cm | 55-56cm | 57-58cm | 59-60cm | 61-62cm | 63cm |
Just1 J39 Xeno Fluo Yellow / Matt Black
The Just1 J39 Xeno Fluo Yellow / Matt Black helmet pairs bright, reflective colour accents with a matt black shell to offer riders an appealing balance of style and practicality. The helmet benefits from ECE 22.06 approval and a double D locking system for secure closure on every journey. Ventilation is managed via eight air inlets and six outlets to maintain airflow during warmer rides, while the two shell sizes and three EPS sizes provide a tailored fit across the size guide. A removable, washable interior keeps hygiene simple and the J.1.E.R emergency removal system adds a further layer of rider safety in the event of an incident.
Comfort, safety and everyday usability are front of mind with the J39 Xeno. The fluo yellow highlights improve visibility in mixed lighting, complementing the underlying matt black shell for a modern look. Whether commuting through city streets or enjoying weekend rides, the helmet’s construction and features support confident riding and long-wear comfort.
Key Features:
- High strength thermoplastic resin shell for durable impact resistance
- ECE 22.06 approved for up-to-date safety compliance
- 2 shell sizes and 3 EPS sizes to offer improved fit across the size guide
- J.1.E.R emergency removal system to assist trained personnel in safe helmet removal
- Removable and washable interior padding for easy maintenance
- 8 air inlets and 6 air outlets to promote effective ventilation
- Double D locking system for secure fastening
- Shell 1 covers sizes XS / S / M for optimised sizing
- Shell 2 covers sizes L / XL for larger head sizes




