Now I'm curious about what a T-wrap is. Something like really large-scale origami? Putting a folded blankie under your knees while doing CPR - this one earned me an argument with the instructor last time I did my refresher class. He insisted that I don't take the 2 seconds needed to put the blanket down. I insisted that there's no use buggering up my knees in a practise situation (I get massive bruising) and in a real situation I promise not to go look around for a cushion/folded blanket before I start CPR...