1. Introduction
Thank you for choosing the Lorelli COSMOS Isofix Car Seat Booster. This booster seat is designed to provide enhanced safety and comfort for older children in vehicles, complying with the latest R129 safety standard. Please read this manual carefully before installation and use to ensure correct operation and maximum safety for your child.
The Lorelli COSMOS booster is suitable for children with a height between 125 cm and 150 cm, typically corresponding to an age range of 6 to 12 years.

Image 1.1: Top-down view of the Lorelli COSMOS Isofix Car Seat Booster, showcasing its ergonomic design and branding.
2. Safety Information and Warnings
Your child's safety is paramount. Adhere to the following guidelines:
- This booster seat is approved according to the UN Regulation No. 129 (R129) for children between 125 cm and 150 cm in height.
- Always secure the child with the vehicle's 3-point seat belt, even for short journeys.
- Ensure the vehicle's seat belt is correctly routed through the designated guides on the booster seat and fits snugly across the child's shoulder and lap.
- Never use the booster seat without the vehicle's seat belt.
- Do not leave your child unattended in the vehicle, even for a short period.
- In the event of an accident, even if the booster seat appears undamaged, it should be replaced. Hidden damage may compromise its safety performance.
- Do not modify the booster seat in any way. Use only original Lorelli replacement parts if necessary.
- Ensure the booster seat is securely installed, even when not in use, to prevent it from becoming a projectile in a sudden stop or collision.
3. Setup and Installation
The Lorelli COSMOS booster seat features an Isofix system for secure and stable installation in your vehicle.
3.1. Pre-Installation Checks
- Verify that your vehicle is equipped with Isofix anchor points.
- Ensure the vehicle seat is free from obstructions.
3.2. Isofix Installation Steps
- Locate the Isofix anchor points in your vehicle's rear seat. These are usually found between the seat back and seat cushion.
- Extend the Isofix connectors on the booster seat by pressing the release buttons (if applicable) and pulling them out.
- Align the Isofix connectors with the vehicle's anchor points and push the booster seat firmly onto the vehicle seat until the connectors click into place. You should hear an audible 'click' and the indicators on the connectors should turn green (if present).
- Push the booster seat firmly against the vehicle seat back to ensure a tight fit. There should be minimal movement.
- For vehicles with deep seats, use the provided Isofix guides (if included) to make attachment easier.

Image 3.1: Side view of the Lorelli COSMOS booster seat, highlighting the extendable Isofix connectors for secure vehicle attachment.

Image 3.2: This composite image illustrates the Lorelli COSMOS booster seat installed in a vehicle, showing both side and front views of a child secured. It also displays the booster seat's underside with Isofix points and separate Isofix guide accessories for easier installation.
4. Operating Instructions
Once the booster seat is securely installed, follow these steps to properly secure your child:
- Place your child on the booster seat, ensuring they are sitting upright and their back is against the vehicle seat back.
- Pull the vehicle's 3-point seat belt over your child and the booster seat.
- Route the lap portion of the seat belt under the armrests of the booster seat and across your child's hips, ensuring it lies low across the pelvis, not on the stomach.
- Route the diagonal (shoulder) portion of the seat belt through the red belt guide (if present) on the booster seat, ensuring it rests centrally on your child's shoulder, not on their neck or off their shoulder.
- Buckle the seat belt and pull the shoulder strap to remove any slack, ensuring a snug fit without being too tight.
- Always double-check the belt routing and tension before every journey.
5. Maintenance and Cleaning
Regular maintenance ensures the longevity and hygiene of your booster seat.
5.1. Fabric Cover
- The fabric cover can be removed for cleaning. Refer to the care label attached to the cover for specific washing instructions.
- Typically, machine wash on a gentle cycle with mild detergent at 30°C. Do not bleach, tumble dry, or iron.
- Allow the cover to air dry completely before reattaching it to the booster seat.
5.2. Plastic Parts
- Wipe plastic parts with a damp cloth and mild soap.
- Do not use abrasive cleaners or solvents, as these can damage the plastic.
5.3. General Care
- Inspect the booster seat regularly for any signs of wear, damage, or loose parts.
- Store the booster seat in a cool, dry place away from direct sunlight when not in use for extended periods.
6. Troubleshooting
If you encounter any issues with your Lorelli COSMOS booster seat, refer to the following common problems and solutions:
- Booster seat feels loose after Isofix installation: Ensure the Isofix connectors are fully engaged and the indicators are green. Push the booster firmly against the vehicle seat back. If still loose, re-install.
- Vehicle seat belt does not fit correctly: Check that the child meets the height requirements (125-150 cm). Ensure the belt is routed through all designated guides and is not twisted. Adjust the vehicle's headrest if it interferes with the shoulder belt path.
- Child complains of discomfort: Verify that the seat belt is not too tight or rubbing against the child's neck. Ensure the child is sitting correctly on the booster seat.
- Missing or damaged parts: Do not use the booster seat. Contact Lorelli customer support or your retailer for assistance.
7. Specifications
| Model Number | 10071852408 |
| Brand | Lorelli |
| Dimensions (L x W x H) | 38 x 43 x 20 cm |
| Item Weight | 1.72 Kilograms |
| Child Height Range | 125 - 150 cm |
| Approximate Age Range | 6 - 12 years |
| Safety Standard | UN Regulation No. 129 (R129) |
| Installation Method | Isofix and Vehicle 3-point Seat Belt |
8. Warranty and Support
The Lorelli COSMOS Isofix Car Seat Booster comes with a standard manufacturer's warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region and retailer. Please retain your proof of purchase for warranty claims.
For warranty service, technical support, or to inquire about replacement parts, please contact your retailer or the official Lorelli customer service in your region. Contact information can typically be found on the Lorelli website or on your purchase receipt.
Always refer to the official Lorelli website for the most up-to-date information and support resources.





