David Gardner used to sell polycryo tarps. Here's how he makes 'em. The link is to Backpacking Light, but it's a forum thread, so you can read for free.

https://backpackinglight.com/forums/topic/how-to-make-a-polycryo-a-frame-tarp/


Edited by JustWalking (06/26/16 04:17 PM)
Edit Reason: changed URL