I ordered some of the 1" polyester webbing from BWDD, it is rated at 3000#'s!!! It has the look and feel of heavy seatbelt webbing. I was unable to sew it, it is waaaay too heavy. I ended up cutting apart some poly tiedown straps that I had to make my tree straps. I will either end up ordering webbing from AHE, or getting the cheap harbor freight straps and using the webbing from them. (I need to make a longer set of straps, big trees around here).
I had great success with the gutterman poly thread from AHE. I used it to sew my tree straps, hammock and tarp. Worked great. AHE has it for a good price, shipping is cheap and they sent my stuff out immediately. I will look for reasons to order from them, great service.
@Tim - the tex 40 should be great for sewing tree straps, from what I can figure I think it is a tiny bit thicker thread than the gutterman from AHE.
I don't want you to think I am dissatisfied with BWDD...they are fantastic with the quality of their ripstop nylon and their price is unbeatable, the service is outstanding as well. I only wanted to say that their 1" poly web is too heavy, at least for those trying to keep the weight down. I just ordered more ripstop from them to make an underquilt. I love buying from people who care about their customers. Both BWDD and AHE are great.