Adult All In One Diaper What Is The Best And Thickest Adult Diaper Available In The World?

What is the best and thickest adult diaper available in the world? - adult all in one diaper

I currently use a foil "Tena" in a strongly absorbing 3 times and I get wet before it begins to sink. I need a thick layer, but as I spent much time in bed and sleep. They know that the thicker diapers for adults in the world at their disposal?
also where can I buy plastic pants in Australia (but not online)?
Thanx a lot!