1. Introduction
This manual provides essential information for the proper use, fitting, care, and maintenance of your Alpinestars Supertech M10 Deegan Monster Helmet. Please read this manual thoroughly before using your helmet to ensure maximum safety and product longevity. Retain this manual for future reference.

Figure 1.1: Side view of the Alpinestars Supertech M10 Deegan Monster Helmet, showcasing its design and ventilation.
2. Safety Information
Your Alpinestars Supertech M10 helmet is designed to provide protection during motorcycling activities. Adherence to safety guidelines is crucial.
- Certification: This helmet meets ECE and DOT safety standards. Always ensure your helmet is certified for your region.
- Proper Fit: A helmet must fit snugly and comfortably. An improperly fitted helmet can compromise its protective capabilities. Refer to the fitting section for guidance.
- Impact Protection: The helmet incorporates a Multi-Directional Impact Protection System (MIPS) designed to reduce rotational forces during certain impacts.
- Emergency Release System (ERS): The cheek pads are equipped with an Emergency Release System to allow for safe removal of the helmet by trained personnel in an emergency.
- No Modifications: Do not modify the helmet in any way, including drilling holes, cutting the shell, or altering the liner. This can severely compromise its integrity.
- Post-Impact Inspection: If the helmet sustains an impact, even if it appears undamaged, it should be replaced. The protective materials may be compromised.
3. Product Features
The Supertech M10 Deegan Monster Helmet incorporates advanced technologies for enhanced protection and comfort:
- Carbon Shell Construction: Utilizes a highly advanced molding technology with a multi-composite combination for optimal strength and lightweight performance.
- Three-Layer Composite Combination: Enhances impact absorption and structural integrity.
- Unique, Patented Visor Release System: Designed for quick and secure visor attachment and detachment.
- Patented A-Head Fitting System: Allows for adjustment of helmet height and angle for a personalized and secure fit.
- Collarbone Protection: The helmet shell base profile is specifically designed to offer protection to the collarbone area.
- Emergency Release System (ERS): Facilitates safe removal of cheek pads by emergency responders.
- Multi-Directional Impact Protection System (MIPS): An integrated low-friction layer designed to reduce rotational motion transferred to the brain from angled impacts.

Figure 3.1: Front 3/4 view of the helmet, highlighting the visor and chin bar design.
4. Setup and Fitting
Achieving a correct fit is paramount for helmet safety and comfort.
4.1 Head Measurement
To determine your helmet size, measure the circumference of your head at its widest point, approximately 1 inch (2.5 cm) above your eyebrows and around the largest part of your head. Use a flexible tape measure.

Figure 4.1: Illustration demonstrating how to measure head circumference for proper helmet sizing.
4.2 Size Chart
| Product Size | Head Circumference (CM) | Head Circumference (Inches) |
|---|---|---|
| XS | 53 - 54 | 20.8 - 21.2 |
| S | 55 - 56 | 21.6 - 22 |
| M | 57 - 58 | 22.4 - 22.8 |
| L | 59 - 60 | 23.2 - 23.6 |
| XL | 61 - 62 | 24 - 24.4 |
| XXL | 63 - 64 | 24.8 - 25.2 |
4.3 A-Head Fitting System
The patented A-Head fitting system allows for fine-tuning the helmet's internal fit. Consult the detailed instructions provided with your helmet for specific adjustments to the height and angle of the helmet on your head. This system helps optimize comfort and MIPS performance.
5. Care and Maintenance
Proper care extends the life of your helmet and maintains its protective qualities.
- Cleaning the Shell: Use a soft cloth dampened with mild soap and water. Avoid harsh chemicals, solvents, or abrasive cleaners, as these can damage the helmet's materials and finish.
- Cleaning the Liner: The internal comfort liner is removable and washable. Hand wash with mild soap and water, then air dry completely before reinserting.
- Visor Care: Clean the visor with a soft, damp cloth and mild soap. Avoid scratching the surface.
- Storage: Store your helmet in a cool, dry place away from direct sunlight and extreme temperatures. Do not store it near heat sources or chemicals.
- Inspection: Regularly inspect your helmet for any signs of damage, such as cracks in the shell, frayed straps, or degraded liner material. Replace if any damage is found.
6. Troubleshooting
This section addresses common concerns you might encounter with your helmet.
- Helmet feels too tight/loose: Re-check your head measurement against the size chart. Utilize the A-Head fitting system for micro-adjustments. If the helmet still doesn't fit correctly, it may be the wrong size.
- Visor not securing properly: Ensure the visor is correctly aligned with the patented release system. Check for any debris obstructing the mechanism.
- Discomfort during wear: Ensure all internal padding is correctly seated. The A-Head system can help adjust pressure points. Break-in period may be required for new helmets.
- Unusual noises or vibrations: Check that all external components (visor, vents) are securely fastened. Inspect for any loose parts.
If you experience issues not covered here or require further assistance, please contact Alpinestars customer support.
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | Alpinestars |
| Model Name | S-M10 Deegan Helmet |
| Part Number | 8300425-433-XL |
| Outer Material | Polymer, Aramid Fiber, Carbon Fiber, Epoxy Resin |
| Inner Material | Expanded Polystyrene (EPS) |
| Certifications | ECE / DOT |
| Weight | Approximately 6.4 Pounds (varies by size) |
| Recommended Use | Motorcycling (Motocross) |
| Age Range | Adult |
| Special Features | MIPS, A-Head Fitting System, Emergency Release System (ERS), Collarbone Protection |

Figure 7.1: Rear view of the helmet, indicating MIPS technology and ventilation ports.
8. Warranty and Support
Your Alpinestars Supertech M10 Deegan Monster Helmet is covered by a manufacturer's warranty. For specific details regarding warranty coverage, duration, and claims process, please refer to the warranty information provided with your purchase or visit the official Alpinestars website.
For technical support, parts, or any other inquiries, please contact Alpinestars customer service through their official channels. Always provide your helmet's model name and part number (S-M10 Deegan Helmet, 8300425-433-XL) when seeking support.
Important: Unauthorized modifications or repairs may void your warranty.





