I bought the cuben from a website called extremtextil.de I'm not sure where you are located, but it probably only makes sense to order there if you're living in europe. Otherwise, I'm sure many people on this forum know some good sources for cuben fiber. The seams are all taped, there's no sewing involved. I used a tape from 3M, the product number is 3M 9485PC. The seams are all done with a single strip of tape, and I just laid the fabric down so it overlapped enough to cover the tape(a little extra overlap to keep the glue from being exposed). The tape is simply sandwiched between the 2 layers of fabric. It seems like the seams are every bit as strong of stronger than the fabric, and I've heard a lot of reports that confirm this. If you want more details on how to do seams with tape, let me know. Maybe I'll do a tutorial on my blog.