I've been increasingly using my front carrying baby bjorn carrier for my 14 month old as I want to be able to hold my toddlers hand and don't want the faff of a push chair.
She is about 9kg/20lb.
I saw someone with a very cool carrier which put their baby on their back, looking like they were having a piggy back. It had a hood to support the baby's head when they fell asleep.
Any ideas of where I can look for such a thing?