S.B.
Hi B. -
I have an 11 mos old son that's around 22 lbs also. I have had in my a Britax Decathlon carseat facing backwards for awhile now because he just got too heavy to be carried around in an infant carrier. He's a chucky little boy so I don't feel that he's being swallowed by the seat. I love it because I actually feel that he's safer with all the padding that Britax offered. Hope this helps.