I'm not sure what exactly a digestive is, but this is the heaviest package if cookies I have ever encountered. There's only like, six cookies in it, but it's a serious brick. You could chuck it at someone's head and do some actual damage, then eat the evidence. It's the perfect, tasty crime!
From the name, I had imagined them being something like a fiber grenade. As soon as you swallowed one, it hit your colon like a fucking fiber bomb, and just blew that shit all over the dining room table. Much to my disappointment, they were pretty much just ordinary cookies. Maybe a little grainer than most, but nothing that sent me running for new shorts.