Chicco MyFit 2-in-1 Harness Booster Car Seat, vs UPPAbaby Extra Mesa Car Seat Base / Compatible
Updated August 2026 — Chicco MyFit 2-in-1 Harness Booster Car Seat, wins on weight and height, UPPAbaby Extra Mesa Car Seat Base / Compatible wins on base weight.
The Chicco MyFit offers greater versatility and comfort for older children, while the UPPAbaby base is a practical solution for families with infant car seats. Overall, the MyFit is the better choice.
Why Chicco MyFit 2-in-1 Harness Booster Car Seat, is better
Versatility
MyFit serves as both a harness and booster seat.
Comfort
Extra-deep ErgoBoost seat with dual-density foam.
Safety Features
Includes Advanced Side Impact Protection.
Why UPPAbaby Extra Mesa Car Seat Base / Compatible is better
Price
UPPAbaby base is cheaper by 17%.
Installation Speed
SmartSecure system allows for quicker setup.
Compatibility
Designed specifically for UPPAbaby Mesa infant seats.
Overall score
Specifications
| Spec | Chicco MyFit 2-in-1 Harness Booster Car Seat, | UPPAbaby Extra Mesa Car Seat Base / Compatible |
|---|---|---|
| Safety Rating | FMVSS 213a | N/A |
| Harness Type | 5-Point | N/A |
| Installation | LATCH & Seatbelt | SmartSecure |
| Age Range | 2-10 years | N/A |
| Recline Positions | 4 | N/A |
Dimension comparison
Overview of the Chicco MyFit 2-in-1 Harness Booster Car Seat
The Chicco MyFit 2-in-1 Harness Booster Car Seat offers versatility and safety for children weighing between 26.5 to 100 lbs. It stands out with its dual functionality, allowing it to transition from a five-point harness car seat for toddlers to a high back booster for older kids. Priced at $239.99, it caters to parents looking for a long-term seating solution that can grow with their child. Its advanced safety features and comfort elements make it a popular choice, as reflected by its sales rank of 3,253.
Overview of the UPPAbaby Extra Mesa Car Seat Base
The UPPAbaby Extra Mesa Car Seat Base is designed specifically for use with UPPAbaby Mesa, Mesa V2, and V3 infant car seats, priced at $199.99. This additional base is ideal for families with multiple vehicles, as it eliminates the hassle of switching bases. The product includes innovative features like SmartSecure installation for quick and easy setup, highlighted by its sales rank of 6,954. Parents can appreciate the added convenience this base provides for their traveling needs.
Safety Features Comparison
Safety is paramount when choosing a car seat or base, and both the Chicco MyFit and UPPAbaby Extra Mesa Car Seat Base excel in this area. The MyFit features Advanced Side Impact Protection, ensuring compliance with federal safety standards. Its steel-reinforced shell and energy-absorbing foam add further layers of security. On the other hand, the UPPAbaby base incorporates a built-in lock-off for secure seat belt installation and a tightness indicator to guarantee proper setup. While the MyFit is designed for older children, the UPPAbaby base focuses on the secure installation of infant car seats, making both products particularly suited for their target age groups.
Installation Ease
When it comes to installation, the Chicco MyFit boasts a premium LATCH system and a LockSure belt-tightening feature, complemented by a four-position ReclineSure leveling system. This makes it easier for parents to achieve a proper fit in their vehicles. The UPPAbaby Extra Mesa Car Seat Base, meanwhile, is designed for rapid installation with its SmartSecure system and auto-retracting LATCH design. The red-to-green tightness indicator simplifies the process even further. While both products prioritize ease of use, the UPPAbaby base is slightly quicker to install due to its specialized features, making it more appealing for those who frequently transition car seats between vehicles.
Comfort Features
In terms of comfort, the Chicco MyFit is designed with an extra-deep, contoured ErgoBoost seat featuring dual-density foam padding. This caters to children in both harness and booster modes, ensuring a comfortable ride for longer journeys. With a 9-position headrest and a 4-position recline, it can be adjusted as your child grows. Conversely, the UPPAbaby Extra Mesa Car Seat Base doesn’t offer seating features itself, as it is meant to provide a secure platform for the infant car seat. Therefore, while the MyFit ensures a comfortable experience for older children, the UPPAbaby base focuses solely on secure installation.
Design and Space Efficiency
The Chicco MyFit is designed with a slim profile, allowing it to fit three-across in a back seat without compromising comfort. Its CupFolders fold away when not in use, making it a space-efficient option for families. In contrast, the UPPAbaby Extra Mesa Car Seat Base has a smooth, finished bottom that prevents damage to car interiors, but it does not offer space-saving features since it is not a standalone seat. For families who prioritize maximizing backseat space, the Chicco MyFit has a clear edge in design efficiency.
Price Comparison
In terms of cost, the Chicco MyFit is priced at $239.99, while the UPPAbaby Extra Mesa Car Seat Base comes in at $199.99. This makes the UPPAbaby base about 17% cheaper than the Chicco MyFit. However, the price difference reflects their different functionalities; the MyFit serves as a versatile car seat for a broader age range, while the UPPAbaby base is a supplementary product designed specifically for infant car seats. Parents should consider whether they need a long-term car seat solution or an additional base for convenience when evaluating the price.
Which should you buy?
Choosing between the Chicco MyFit 2-in-1 Harness Booster Car Seat and the UPPAbaby Extra Mesa Car Seat Base ultimately depends on your family’s specific needs. If you require a versatile car seat that grows with your child and offers advanced safety features, the Chicco MyFit is an excellent choice. However, if you already own a UPPAbaby Mesa infant car seat and need an extra base for convenience, the UPPAbaby Extra Mesa Car Seat Base is a practical and cost-effective option. Both products excel in their respective categories, making them reliable choices for ensuring safety and comfort for young passengers.

