I'm guessing that the XXXXL with hood could be used as an emergency shelter for 2 people, one per side? LOL.

I have a tyvek painter's coverall as an emergency windbreak or vapor barrier in my rescue pack. I don't think I'd use it on a regular basis while, say, actually hiking.

Many moons ago my first ex-husband was in hazmat, and I met up with him one summer day after he got off a job but hadn't taken off his tyvek yet. When I pulled into the parking lot he was pouring about a quart of water out of his rubber boots. I asked if he'd jumped in a pool or taken a shower before taking off his stuff, and he said "no, that's sweat". Ewwwwwww! The super heavy duty chemical-safe tyvek suits definitely do not breathe... however, if you want to recycle the water you drink in and then sweat out... <img src="/forums/images/graemlins/shocked.gif" alt="" />

MNS