Peg Perego Viaggio Flex 120
Safety notice: No US recall names the Viaggio Flex 120 (searched 19 Oct 2026). Check your seat's model number and date of manufacture at nhtsa.gov/recalls.
Pros
- The backrest folds in half into a carry-on-size shape with handles
- Headrest, backrest and side wings adjust separately
- No lower armrests, so kids buckle without frame interference
Cons
- 15.7 lb is heavier than most of the lightweight boosters here
- Four adjustments take a few minutes to set up
Our Verdict: Peg Perego Viaggio Flex 120
The Peg Perego Viaggio Flex 120 scored 72 out of 100 across the three criteria we score every booster seat on, and took Best Folding Booster in our booster seat guide.
Folding is the trick. The backrest folds in half over the seat pan into a compact shape with built-in handles, and with no lower armrests a child can click the belt in with no frame in the way.
At 15.7 lb it isn't light, and the four-way adjustment takes a few minutes to set for a growing child. Crash testing scored 7.5, behind the top four.
Our Analysis, Comparisons and Test Results
Crash test
7.5 out of ten. Side-impact performance was the standout, which our crash testing credits to broad EPS foam-lined wings.
Weight & size
7 out of ten. 15.7 lb, but it folds to roughly 10 x 17 x 24 in and goes easily into a trunk.
Quality
7 out of ten. A steel-reinforced backrest frame, built in Italy.
Should You Buy the Peg Perego Viaggio Flex 120?
Buy it if it has to pack small for a trunk or a trip.
The Cybex Solution G2 also folds, weighs less and scored six points higher overall.
No booster seat in this guide wins on all three criteria. The ones that score well do it by being honest about what they gave up, so read the low column before the high one.
What Other Car Seats Should You Consider?
We scored the Peg Perego Viaggio Flex 120 against ten other booster seats on the same criteria. The three closest on score:
| Compare | Score | Award | Tested in |
|---|---|---|---|
| Peg Perego Viaggio Flex 120 (this review) | 72 | Best Folding Booster | Best Booster Seat 2026: 11 Seats Compared |
| Diono Cambria 2 XL | 72 | Best for Bigger Kids | Best Booster Seat 2026: 11 Seats Compared |
| Graco TurboBooster 2.0 | 72 | Best No-Frills High-Back | Best Booster Seat 2026: 11 Seats Compared |
| Britax Grow With You ClickTight | 73 | Best Harness-to-Booster Seat | Best Booster Seat 2026: 11 Seats Compared |
| Maxi-Cosi RodiSport | 73 | Best Straightforward Booster | Best Booster Seat 2026: 11 Seats Compared |
| BubbleBum Inflatable Booster | 68 | Best Travel Booster | Best Booster Seat 2026: 11 Seats Compared |
Specifications
| Type | Folding high-back booster |
|---|---|
| Weight | 15.7 lb (our testers' figure) |
| Child limits | 40–120 lb |
| Install | Rigid LATCH |
Conclusion: Peg Perego Viaggio Flex 120
The Flex 120 took the folding-booster award with 72. Quality and weight at 7 are its lowest marks.
See how it ranks against the rest in Best Booster Seat 2026: 11 Seats Compared.
Tested against 10 other car seats in Best Booster Seat 2026: 11 Seats Compared. See all car seats guides and reviews.