
Features & Details
Cyril Helmets / Modular
THUNDER
Dual-Visor Convenience. Flip-Up Comfort. Everyday Modular Riding.
Open when you need it. Protected when you move.
Certified coverage in a durable shell.
Certified Road Protection
Meets DOT FMVSS No. 218 and ECE 22.06 standards for dependable road protection.
Durable Outer Shell
Durable shell construction helps provide confident coverage for commuting and regular riding.
Impact support with day-to-night visibility.
Protective Interior
Impact-absorbing inner construction helps support rider protection and daily comfort.
Dual Visor System
Clear outer shield and inner sun visor help adapt to changing light throughout the day.
A wider view and practical flip-up comfort.
Wide-View Design
A broad visor opening helps create a clearer, less restrictive riding view.
Flip-Up Convenience
Modular functionality and a washable liner add practical comfort for everyday use.
Find your size.
Measure around the widest part of your head, just above the eyebrows and ears. Keep the tape level, then use the chart.
| Size | Centimeters | Inches |
|---|---|---|
| S | 54–55 cm | 21.25–21.65 |
| M | 56–57 cm | 22.04–22.44 |
| L | 58–59 cm | 22.83–23.22 |
| XL | 60–61 cm | 23.62–24.01 |
| XXL | 61–62 cm | 24.01–24.40 |
Box Packaging.
Your helmet arrives protected, organized,
and ready to go.
Sustainable materials. Thoughtful design.
CYRIL quality, down to the box.
What's included
- 1 Helmet
- User manual
- Protective bag
- Basic accessories
Packaging details
- Branded kraft paper box
- Protective inner packaging
- Ready for storage or gifting
- Secure transport packaging