BPL Aircore URSA Dyneema Bear Bag Hanging Rope. I got the 50' hank they are selling.
If that is what you are interested in, then look at that stuff that pure-mayhem found on ebay. The seller is calling it Amsteel, but it isn't.
That stuff is very close to the BPL bear bag hanging stuff and a lot cheaper. For $45 you get 290' instead of the 50' BPL sells for $30. The BPL dyneema is 2.5 mm, rated at 1400 lbs and the ebay dyneema is 3 mm rated at 1200 lbs.
The ebay dyneema is made by Samson. Don't know who makes the BPL stuff. They don't say.