Welcome to the Chicco MyFit Manual, your guide to understanding and using the MyFit Harness Booster Car Seat. This versatile seat adapts to your child’s growth, offering both harness and booster modes. Designed for children from 25 to 100 lbs and up to 57 inches tall, it ensures safety, comfort, and proper fit. Inside, you’ll find detailed instructions for installation, adjustment, and maintenance to maximize your child’s protection and comfort on the road.

Overview of the Chicco MyFit Harness Booster Seat
The Chicco MyFit Harness Booster Seat is a versatile and adaptive child restraint system designed to accommodate your child’s growth. It operates in two modes: harness mode for younger children and booster mode for older kids. The seat is suitable for children weighing between 25 and 100 pounds and up to 57 inches tall, ensuring a secure and comfortable fit throughout their development. Its dual-mode design allows parents to transition seamlessly as their child grows, providing long-lasting use. The MyFit features advanced safety technologies, including side impact protection and weight distribution systems, to maximize protection in the event of a crash. Additionally, its ergonomic design prioritizes comfort, making it an ideal choice for daily use. This seat is a practical and reliable option for families seeking a high-quality, adaptable car seat solution.
Key Features and Benefits of the MyFit
The Chicco MyFit Harness Booster Seat is equipped with several key features that enhance safety, comfort, and convenience. One of its standout features is the DuoGuard system, which includes a triple-layer impact protection and a steel-reinforced frame for added durability and safety in the event of a crash. The seat also offers EPS energy-absorbing foam, which helps to distribute forces effectively, ensuring maximum protection for your child. Additionally, the MyFit features 6-position headrest and 10-position harness adjustments, allowing for a customized fit as your child grows. The Quick-Remove Cover makes cleaning easy, and the padless installation option provides a secure fit without the need for additional padding. These features combined make the MyFit a reliable and practical choice for parents seeking a high-quality car seat.
Weight and Height Requirements
The Chicco MyFit Harness Booster Seat is designed to accommodate children within specific weight and height ranges to ensure safe and proper use. In harness mode, the seat is suitable for children weighing between 25 and 100 pounds and standing between 30 and 57 inches tall. Once your child outgrows the harness, the seat can be converted to booster mode, supporting children weighing up to 120 pounds and measuring up to 57 inches in height. These requirements ensure the seat provides optimal protection and fit as your child grows. Always refer to the manual to confirm the weight and height limits for each mode to guarantee your child’s safety and proper positioning in the vehicle.

Installation Methods
The Chicco MyFit can be installed using the LATCH system or vehicle seatbelt, offering flexibility and secure positioning in various vehicles. Ensure proper fit by following manual guidelines.

Using LATCH System for Installation
The LATCH (Lower Anchors and Tethers for Children) system provides a secure and straightforward installation method for the Chicco MyFit. Locate the lower anchors in your vehicle, typically found between the seat cushions. Attach the MyFit’s LATCH connectors to these anchors, ensuring they snap securely into place. Tighten the straps by pulling them firmly to eliminate any slack. Next, attach the top tether to the vehicle’s tether anchor, tightening it to prevent excessive movement. Ensure the seat is level and fits snugly against the vehicle seat. Refer to your vehicle’s manual to confirm LATCH anchor locations and weight limits. Always verify the installation by gently rocking the seat side to side and front to back to ensure stability. Proper LATCH installation ensures optimal safety and correct positioning for your child.
Seatbelt Installation Procedure
For seatbelt installation, thread the vehicle’s seatbelt through the designated path on the Chicco MyFit. Ensure the seatbelt is fully extended and free of twists. Buckle the seatbelt and pull the webbing to tighten it around the seat. Check that the seat is level and fits firmly against the vehicle seat. Tighten the seatbelt further by pulling the webbing until it feels snug and secure. Ensure no slack remains, as this is critical for safety. Finally, verify the installation by gently rocking the seat to confirm it doesn’t move excessively. Always consult your vehicle’s manual to ensure compatibility and proper seatbelt routing. Proper seatbelt installation ensures the MyFit stays securely in place during travel, providing reliable protection for your child.
Transitioning from Harness to Booster Mode
Transitioning the Chicco MyFit from harness to booster mode is straightforward when your child outgrows the harness. First, remove the harness straps and crotch strap, storing them securely. Next, locate the booster mode adjustment features, such as the headrest and seat depth, and position them to fit your child’s height. Ensure the vehicle’s seatbelt is properly routed over your child’s shoulders and hips, following the seatbelt guides on the booster. Tighten the seatbelt and verify proper fit by checking the shoulder belt crosses the center of the chest and the lap belt fits snugly across the hips. Always refer to the manual for exact weight and height limits for booster mode. Proper transition ensures your child continues to travel safely as they grow.

Adjusting and Securing the Seat
The Chicco MyFit seat offers multiple adjustment options for optimal fit. The harness can be height-adjusted to accommodate growing children, ensuring proper shoulder alignment. The headrest is also adjustable, providing support and maintaining correct posture. To secure the seat, use the LATCH system or vehicle seatbelt, tightening straps firmly to prevent movement. The crotch strap should be positioned correctly based on the child’s size for added safety. Additional padding can be adjusted for comfort, ensuring a snug and secure fit. Always refer to the manual for specific guidance on adjustments and securing the seat to ensure your child’s safety and comfort.
Strap Adjustment for a Secure Fit
Adjusting the straps of the Chicco MyFit is essential for ensuring your child’s safety and comfort. Begin by loosening the harness straps completely. Place your child in the seat and fasten the harness, making sure the straps are snug against their body. Tighten the straps evenly, ensuring there is no slack. The harness should fit comfortably, with the straps lying flat and not twisted. For proper positioning, the shoulder straps should be at or slightly below your child’s shoulders when in booster mode. The crotch strap should be positioned to fit snugly between the legs without causing discomfort. Regularly check the strap fit as your child grows, ensuring the harness system continues to provide optimal support and protection. Proper strap adjustment ensures your child is secure and comfortable during travel.
Proper Belt Positioning
Ensuring proper belt positioning is critical for your child’s safety while using the Chicco MyFit in booster mode. The vehicle’s seatbelt must cross your child’s body correctly, with the shoulder belt resting across the middle of their shoulder and chest, avoiding the neck or arm. The lap belt should lie low across the hips, not the abdomen. Never allow the belt to twist or bunch up, as this can compromise safety. Regularly check the belt position to ensure it remains in the correct place, especially as your child grows. Proper belt positioning ensures the seatbelt functions effectively in the event of sudden stops or collisions, providing optimal protection for your child. Always verify that the seatbelt is snug and correctly placed before each trip to guarantee your child’s safety while traveling.
Ensuring Correct Seatbelt Placement
Correct seatbelt placement is essential for maximizing your child’s safety while using the Chicco MyFit in booster mode. The shoulder belt should lie snugly across your child’s shoulder and chest, avoiding contact with the neck or arm. The lap belt must sit low and flat across the hips, not the stomach. Ensure the seatbelt is not twisted or bunched, as this can reduce its effectiveness. To achieve proper placement, adjust the MyFit’s headrest so the shoulder belt aligns correctly with your child’s body. Always verify the seatbelt’s position before each trip, as even slight shifts can affect safety. Proper seatbelt placement ensures your child is protected in the event of sudden stops or collisions, providing optimal safety and comfort during travel.

Maintenance and Upkeep
Regularly clean the Chicco MyFit, inspect for wear, and store correctly when not in use. Wash fabric covers with mild detergent, avoiding harsh chemicals to maintain safety and condition.
Cleaning the Seat Fabric
Clean the Chicco MyFit seat fabric regularly to maintain hygiene and appearance. For routine cleaning, use a soft, damp cloth to wipe away surface dirt and stains. For more thorough cleaning, remove the fabric covers and hand wash them with mild detergent in cold water. Avoid using bleach, harsh chemicals, or machine washing, as this may damage the material or weaken the seat’s structure. Gently scrub stained areas with a soft-bristle brush, rinse thoroughly, and allow the covers to air dry completely before reattaching them to the seat. Never machine dry or iron the fabric, as this could cause shrinkage or damage. Regular cleaning ensures the seat remains safe, comfortable, and looking its best for your child. Always follow the manufacturer’s instructions to avoid voiding the warranty.
Removing and Replacing Fabric Covers
To remove the fabric covers from your Chicco MyFit, start by locating the release mechanisms, which are often hidden under the seat or along the straps. Gently pull these tabs or straps to release the covers from the seat shell. For some models, you may need to slide the covers off after releasing the snaps. Once removed, inspect the covers for any wear or stains. To replace the fabric, align the covers with the seat shell and reattach them securely using the snaps or straps provided. Ensure a snug fit to maintain the seat’s safety and comfort. Always refer to the manual for specific instructions, as improper installation could compromise the seat’s performance. Regularly replacing or washing the covers helps keep the seat clean and hygienic for your child.
Storing the MyFit When Not in Use
When storing the Chicco MyFit, ensure it is clean and dry to prevent damage or odors. Remove any loose items like the harness or straps to avoid tangling or creasing. Place the seat in its original packaging or a sturdy box to protect it from dust and scratches. Store it in a cool, dry location away from direct sunlight, as heat can degrade the materials. Avoid storing it in attics or basements prone to moisture or pests. Before reuse, inspect the seat for any damage or wear. Proper storage ensures the MyFit remains in good condition and ready for future use. Always follow these steps to maintain the seat’s safety and longevity.

Troubleshooting Common Issues
Ensure proper fit and function by regularly checking and adjusting straps. Clean the seat as needed and refer to your manual for resolving common issues.
Resolving Harness Tightness Problems
If your child experiences discomfort due to a too-tight harness, start by loosening the straps slightly. Ensure the harness is snug but not restrictive. Adjust the shoulder straps to fit your child’s body properly, making sure they are even and not twisted. Check the chest clip position—it should be at armpit level. If issues persist, refer to the manual for guidance on harness adjustment. Always verify the harness fit after adjustments to ensure safety. If the problem continues, contact Chicco customer service for assistance. Regularly inspect the harness for proper fit and function to prevent tightness issues. Proper harness adjustment is crucial for both comfort and safety, so take the time to ensure it’s correctly fitted every time.
Addressing Seatbelt Compatibility Concerns
Ensure your vehicle’s seatbelt is compatible with the Chicco MyFit by checking its type and length. The MyFit is designed to work with most lap-shoulder belts. If the seatbelt is too short or doesn’t fit properly, consult your vehicle’s manual for guidance. Always follow the MyFit manual for correct seatbelt routing. If issues arise, such as the belt not staying in place, try repositioning the booster or adjusting the seatbelt guide. Contact Chicco customer service for further assistance. Regularly inspect the seatbelt for proper function and fit. Proper seatbelt compatibility ensures your child’s safety and comfort. Always verify the setup after adjustments to guarantee correct placement and security.
Understanding and Responding to Recall Notices
Recall notices are critical communications from Chicco regarding safety improvements or repairs for the MyFit. Always register your MyFit on Chicco’s official website to receive timely recall updates. If a recall is issued, carefully review the instructions provided by Chicco. Contact their customer service to confirm the issue and arrange for any necessary repairs or replacements. Do not ignore recall notices, as they are issued to ensure your child’s safety. Keep the product registration up to date to receive notifications directly. For more information, visit the Chicco website or refer to the recall section in the full manual. Prompt action ensures your MyFit remains safe and reliable for your child. Always prioritize safety by addressing recalls without delay.

Safety Features and Compliance
The Chicco MyFit incorporates advanced side impact protection and weight distribution technology to ensure optimal safety. It meets all federal safety standards for car seats, providing reliable protection for your child in various crash scenarios. The seat’s design prioritizes structural integrity and energy absorption, while its rigorous testing ensures compliance with safety regulations. These features make the MyFit a trusted choice for parents seeking a secure and compliant car seat solution.
Side Impact Protection Features
The Chicco MyFit is equipped with advanced side impact protection features designed to safeguard your child in the event of a crash. The seat boasts deep, energy-absorbing side wings that provide superior protection for your child’s head, neck, and torso. These wings are engineered to distribute crash forces away from your child, minimizing the risk of injury. Additionally, the MyFit’s reinforced headrest and precision-padded design work together to absorb and redirect impact energy. These features ensure maximum safety and comfort, meeting rigorous safety standards. The seat’s structural integrity and innovative materials further enhance its ability to protect your child in side-impact scenarios, offering peace of mind for parents. By combining advanced engineering with thoughtful design, the MyFit delivers exceptional side impact protection.
Weight Distribution Technology

The Chicco MyFit incorporates advanced weight distribution technology to ensure optimal safety and comfort for your child. This technology is designed to evenly distribute the forces of a crash across the seat, reducing the risk of injury. The MyFit’s sturdy frame and precision-engineered materials work together to absorb and redirect energy, while the seat’s contoured design helps maintain proper alignment. This innovative system ensures that the seatbelt or harness applies consistent pressure, preventing excessive force on any single point. By balancing weight distribution, the MyFit provides superior protection and stability, keeping your child secure in various collision scenarios. This technology is a key component of the seat’s safety performance, offering reliable protection and peace of mind for parents. The MyFit’s weight distribution system is engineered to meet rigorous safety standards, ensuring your child’s well-being on the road.
Meeting Federal Safety Standards
The Chicco MyFit Harness Booster Seat is designed to meet or exceed all applicable federal safety standards for child restraint systems. Rigorous testing ensures compliance with FMVSS 213, which governs crash performance, structural integrity, and labeling requirements. The seat undergoes extensive evaluation, including front, side, and rear impact tests, to guarantee its ability to protect a child in various collision scenarios. The MyFit’s materials and construction are carefully selected to meet strict safety criteria, ensuring durability and reliability. Additionally, the seat’s weight and height limits align with federal guidelines, providing clear usage parameters for parents. By adhering to these standards, the MyFit offers a safe and reliable option for securing your child during travel. This compliance gives parents confidence in the seat’s performance and its ability to protect their child effectively.

Additional Resources and Support
Chicco offers comprehensive support, including online resources, customer service, and warranty information, to assist with any questions or concerns about the MyFit Harness Booster Seat.
Accessing the Full User Manual Online
To access the full Chicco MyFit manual online, visit the official Chicco website and navigate to the “Support” or “Manuals” section. Search for the MyFit Harness Booster Seat model, and download the PDF version. This ensures you have the most up-to-date instructions and safety guidelines. The online manual is convenient, searchable, and environmentally friendly. It includes detailed diagrams, installation guides, and troubleshooting tips. If you prefer a physical copy, you can print the PDF or request one from Chicco customer service. Always refer to the official Chicco website to avoid outdated or incorrect information. This resource is essential for proper usage, safety, and maintenance of the MyFit seat. Regularly check for updates to stay informed about recalls or new features. Accessing the manual online is quick, easy, and ensures you have all the information needed to use the MyFit safely and effectively.
Registering Your Product for Safety Updates
Registering your Chicco MyFit Harness Booster Seat ensures you receive important safety updates, recall notices, and product improvements. To register, visit the official Chicco website and locate the “Product Registration” section. You will need to provide your contact information and the seat’s serial number, which can be found on the underside of the base or in the user manual; Registration is a simple process that helps Chicco notify you of any critical updates or safety alerts. This step is essential for maintaining your child’s safety and ensuring compliance with the latest regulations. By registering, you also gain access to exclusive customer support and updates on new features or accessories. Regular updates help ensure your MyFit seat remains safe and functional over time. Make sure to complete this step shortly after purchase to stay informed and protected.
Contacting Chicco Customer Service
If you have questions or concerns about your Chicco MyFit Harness Booster Seat, contacting customer service is straightforward. Visit the official Chicco website and navigate to the “Contact Us” page, where you can find a form to submit your inquiry. You can also call their customer service hotline at 1-877-424-4226, available Monday through Friday from 9 AM to 5 PM EST. For email inquiries, reach out to consumer-service@chiccousa.com. Be sure to include your product name, serial number, and a detailed description of your issue to ensure prompt assistance. Chicco’s customer service team is dedicated to providing helpful and timely support to address any questions or concerns about your MyFit seat. Their expertise ensures you receive accurate information to maintain your child’s safety and satisfaction.



















































