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by ricc 644 days ago
I thought it was going to be made of cloth that stiffens when current passes through it... :)
1 comments
hedora 643 days ago
I thought you were going to mention concrete canvas, which stiffens into a semipermanent (10 year) structure when wet:

https://www.concretecanvas.com/us/cc-shelters/

Bring your own cave?

link