I spooled some DynaGlide onto a dog leash. I use it as both a pulldown and to haul my bow or rifle up behind me. As I understand it, DynaGlide and ZingIt and the like are just small-diameter Dyneem (Amsteel) that's coated with something to make it slick so it doesn't catch on rough bark.
I like it. It doesn't tangle, and is too slick to catch on bark like paracord does. Only downside is that it's very narrow and as such can be a bit of a bear to haul up anything heavier than a rifle. If I need to reef on it to get my rappel line down I'll wrap it around my 1-stick to get better leverage with it.