Booster car seats that fit three across in a back seat
Which booster car seats fit three across in a back seat?
PEG Perego Viaggio Flex 120: Its narrow footprint and lack of armrests let it fit a tricky three-across arrangement. Its three width modes let it stay narrow enough for three-across installations in small cars or spread to fit larger children. Britax Highpoint 2-Stage: The video says it has higher weight and height limits than many boosters, a 10-position headrest, slim lightweight design for three-across, color-coded belt guides, and SecureGuard. Cybex Solution G2: Comfort has been fine with no complaints and handling is much easier than with a previous rotating seat; the side panels can be pressed in to free space when three people sit in the back.
| Product | Why | Three-across fit | Dimensions | Certification | Overall score |
|---|---|---|---|---|---|
| 1. PEG Perego Viaggio Flex 120 sold by albeebaby.com | Its narrow footprint and lack of armrests let it fit a tricky three-across arrangement. | Its narrow footprint and lack of armrests let it fit a tricky three-across arrangement. blog | The Car Mom reports a 14-inch seat bottom and a widest point of about 17 inches in narrow mode; BabyGearLab reports 16.3 inches at its widest, so the sources disagree on reported width. blog | Meets or exceeds Federal Motor Vehicle Safety Standard 213 for motor vehicles, and is NOT certified for aircraft use. manual | Scored 78/100 and ranked second of seventeen boosters tested, and was named the easiest-to-use booster in that test. review |
| 2. Britax Highpoint 2-Stage sold by albeebaby.com | The video says it has higher weight and height limits than many boosters, a 10-position headrest, slim lightweight design for three-across, color-coded belt guides, and SecureGuard. | The video says it has higher weight and height limits than many boosters, a 10-position headrest, slim lightweight design for three-across, color-coded belt guides, and SecureGuard. review | Specs listed 16 by 21.5 by 35 inches, 12 pounds, and 40-120 pound weight capacity. blog | - | Weighted rating 4.70/5.0; features include easy high-back-to-backless transition, SecureGuard, multiple layers of side impact protection, and color-coded belt paths. review |
| 3. Cybex Solution G2 sold by albeebaby.com | Comfort has been fine with no complaints and handling is much easier than with a previous rotating seat; the side panels can be pressed in to free space when three people sit in the back. | Comfort has been fine with no complaints and handling is much easier than with a previous rotating seat; the side panels can be pressed in to free space when three people sit in the back. review | - | It is approved to UN R129/04 (i-Size) for stature height 100-150 cm, used forward-facing; the maker's US web page instead gives 43.3-60 inches, so the sources disagree on the height range. manual | One independent review reports 7.1/10 on crash testing and 74/100 overall, 5th of 16 boosters, with head and chest sensor readings well below average, while BabyGearLab's own page reports 7.5/10 and 75/100; the sources disagree. review |
Also cited in the text
- PEG Perego Viaggio Flex 120, width: Its three width modes let it stay narrow enough for three-across installations in small cars or spread to fit larger children. blog
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Written 2026-10-11T04:23:54.852Z.
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