Maxi-Cosi Tanza i-Size
High-back booster, 100-150 cm; vehicle three-point belt required.
Pros / Cons
Pros
- The backrest folds down for carrying and storing the seat between journeys.
- Belt-only installation is allowed, with ISOFIX recommended where compatible anchors are available.
Cons
- There is no internal harness: the child must fit the 100-150 cm range and sit correctly throughout the journey.
- A two-point lap belt cannot be used; check the shoulder and lap guides in each car.
Product Facts
- Height Range
- 100-150 cm
- Seat Use
- Booster
- Install Method
- Forward-facing booster: vehicle three-point belt; ISOFIX optional and recommended when available.
- Product page
- Open product page
- Price/Buy
- Check price at Amazon
The Tanza i-Size is worth comparing when a folding high-back booster would make car swaps or storage easier. The backrest folds down for carrying between cars and storing the seat when it is not needed.
A booster, not a harnessed seat
The approved height range is 100-150 cm. Maxi-Cosi’s approximate 3.5–12-year age guide does not replace that range or the need for a child who stays seated correctly. Tanza has no internal harness: the vehicle belt holds the child. If your child leans out of the belt or cannot keep it positioned during sleep, this is not yet a suitable next seat.
Try the belt route before buying
Use it forward-facing with a three-point vehicle belt, never a lap-only belt. ISOFIX is optional; the manufacturer recommends using the connectors when the car has compatible anchors. It does not replace buckling the child with the vehicle belt. Adjust the headrest so the shoulder belt runs correctly through its guide and route the lap section through the marked guides.
Unfold and secure the seat for every journey, and check the belt retracts freely after the child moves. The Tanza manual shows both installation options. Check the folded seat against your available storage space rather than assuming a folding car seat is approved for aircraft use.