I bought a car seat travel bag today as it was on sale. I didn't do any research but have 2 weeks to return if I want.

Are these necessary? and if so, is there a recommended one?

I bought this one as it says it fits Safety 1st which is what i bought for our second car and for when we travel by plane (which is not very often at all).

http://www.amazon.com/Childress-Wheelie-Seat-Travel-Black/dp/B000XA6DC6/ref=sr_1_4?ie=UTF8&qid=1408827342&sr=8-4&keywords=car+seat+travel+bag