# 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\.
### 1. [PEG Perego Viaggio Flex 120](/products/ucp/albeebaby-com/9564436300007) (sold by albeebaby\.com)
Its narrow footprint and lack of armrests let it fit a tricky three\-across arrangement\.
- Three\-across fit: Its narrow footprint and lack of armrests let it fit a tricky three\-across arrangement\. (blog)
- Dimensions: 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)
- Certification: Meets or exceeds Federal Motor Vehicle Safety Standard 213 for motor vehicles, and is NOT certified for aircraft use\. (manual)
- Overall score: 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](/products/ucp/albeebaby-com/9564460155111) (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\.
- Three\-across fit: 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)
- Dimensions: Specs listed 16 by 21\.5 by 35 inches, 12 pounds, and 40\-120 pound weight capacity\. (blog)
- Certification: -
- Overall score: 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](/products/ucp/albeebaby-com/9564462547175) (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\.
- Three\-across fit: 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)
- Dimensions: -
- Certification: 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)
- Overall score: 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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