Tyvek is water resistant, not waterproof, and vapor permeable. This is why it is used to make painter's coveralls - unlike plastic it lets you wear it without soaking in your own sweat.
It gets less noisy with washing.
It doesn't make a good hammock because it will not support the weight. People at hammock forum have tried. Tore right through. Once it starts, it just tears.
I have a tarptent made of Tyvek (the Sublite) for a specific kind of outing - it has been a champ in terms of condensation, and unlike nylon it reflects rather than absorbs the heat of the sun, so it makes a very good desert tent. Camping in Big Sur all the nylon tents were drenched on the inside in the morning and I was dry as a bone. The only time the fabric got wet was in a freeze - the water didn't freeze but it gathered in the fabric so it was wet inside and out, and then it did not dry very easily.
--- In firstname.lastname@example.org, Ralph Oborn <Ralph.oborn@...> wrote:
> In general tyvek is a little noisy and since it is water proof can form
> condensation puddles under you.
> It can be "washed" and made more flexible (and quiet).
> On another note I just made a hammock from the black " landscape fabric"
> that you use to block weeds etc.
> It does pass water readily, and seems to be durable.