The Dyneema is hard to beat. For an Ultralight more puncture proof fabric I think the Cuben is better, although not as handsome
I'm still trying to wrap my mind around Cuben. From what I've read, it can be somewhat difficult to work with. Now that I have a pack with some Spectra/Dyneema on it, I can see why people like it - the fabric is very strong and durable and has a good texture to it.
