Large Black

No, don't need for any public transport. Even taxis don't require car seats, but might still be wise for safety. For rental cars, it's very cheap to add car seat option. If you travel a lot with a kid, I recommend getting [https://www.amazon.com/RideSafer-Lightweight-Convenient-Everyday-Rideshare/dp/B07WMTQHCL/](https://www.amazon.com/RideSafer-Lightweight-Convenient-Everyday-Rideshare/dp/B07WMTQHCL/), it's very compact and saves a lot of headache.

The RideSafer vest is our method, once she got big enough to use it safely. It folds very small into our luggage.

Also like the ride safer vest. FWIW, bubble bum did not work well for us and, imo, did not position my kids or the belt as safely. (It was okay for my 9 year old, but not great for my 7 year old. Both my kids are small for their age.)

Highly recommend this for short trips where you don’t want to bring a huge car seat https://shop.saferide4kids.com/products/ridesafer-travel-vest?wickedsource=google&wickedid=CjwKCAjwr8LHBhBKEiwAy47uUlGM_tjLZ0jwtqItmMvulB0GupMGPUOgRk3T6XZOo-kR2-QjdIzP3RoCyK0QAvD_BwE&wickedid=&wcid=19163175733&wv=4&wickedsource=google&wickedid=CjwKCAjwr8LHBhBKEiwAy47uUlGM_tjLZ0jwtqItmMvulB0GupMGPUOgRk3T6XZOo-kR2-QjdIzP3RoCyK0QAvD_BwE&wickedid=&wcid=19163175733&wv=4&gad_source=1&gad_campaignid=20622591769&gclid=CjwKCAjwr8LHBhBKEiwAy47uUlGM_tjLZ0jwtqItmMvulB0GupMGPUOgRk3T6XZOo-kR2-QjdIzP3RoCyK0QAvD_BwE

We got the RideSafer Travel Vest for our 3yo for our last trip. It was great. It’s not approved for planes, and I wouldn’t use it to replace a car seat for longer trips at his age (we live in LA so lots of driving) but for quick trips on vacation to not need the car seat, it’s amazing.

Ride safer vest for the 4 year old and wheel your carseat on a trolley for the 1.5 year old. We also have a cosco seat for our youngest bc it's so light, but you can definitely get away with not.

The size is based on fit, but my daughter is in this one now and started at 4.5: [https://a.co/d/7EYJKTC](https://a.co/d/7EYJKTC)

If your children are at least late 2 in age, I recommend the Ridesafer Travel Vest. It passes the same safety tests as car seats. Make sure you watch some videos to learn how to use it correctly. Don't get the knockoffs. The one by Ridesafer is the only one that has gone through all the testing.  I used the vest with my 3 year old during a trip abroad. Another option, which is pricey, is the Wayb Pico seat. It folds up very compactly, and you can buy a backpack for it.