A guy I used to know said he used it as protection against wind and rain, but it was useless for warmth retention.

The flammability warning on it: 'Warnings: 1.) Tyvek®, ProShield®, and Tychem® fabrics are not flame resistant and
should not be used around heat, flame, sparks, or in potentially
flammable or explosive environments.'

I wouldn't want to be wrapped in it beside an open fire.

There's a woman who sews it to make kites. I don't think most adhesives work on it well enough to endure much stress.

Sue