One of the items on the gear list for the Amazon 5000 expedition was bank line. I had no idea what it was so I looked it up at the link provided. It is basically just tarred twine. The advantages touted for bank line are that it is supposed to be more resistant to the environment, petroleum products etc than traditional twine. Because I've been using paracord for so long, I elected not to purchase the bank line and instead bring my usual assortment of paracord lengths. With all new things I am very skeptical until I see the evidence myself. I did not want to be using bank line for the first time in the jungle and have it not fit into my system. As I found out, the expedition uses a TON of bank line and for good reasons. It is used for making traps, for fishing line and in any of the roles in which you would use paracord. The first time I used it was as guy lines for a tarp. We had camped on a sandbar in the Amazon and I rigged up a makeshift tarp/mosquito net shelter. I still used my 30' length of paracord for the ridge line. Old habit I guess. As the trip wore on, I found myself really liking bank line. The main advantages I see of bank line are: 1) The #36 bank line has a breaking strength reported at 340 pounds. This is about 62% the reported breaking strength of paracord. 2) While you sacrifice a little in terms of strength, bank line takes up FAR less space in your pack and weighs less. You would have to decide for yourself whether or not you would utilize more than 340 pounds of breaking strength, but I typically do not unless repelling is involved. In the case where I would need more than 340 pounds of breaking strength, I tend to use real rope. 3) In my limited experience, the knots are less bulky and seem to hold better with bank line. The difference could be in my skill level at knot tying. Anyway, I thought it might be something to look at and see if it might fit into your system.