Greetings everyone,
My first post ... a head's up that there's a product currently on sale for $4.48 (3M indoor Window Insulator Kit - Patio Door) at Target which looks to be the same, or similar to, to the 'polycryo' sold by Gossamer Gear and other gear suppliers for use as tent groundcloth:
https://www.target.com/p/3m-indoor-window-insulator-kit-patio-door/-/A-14773970?clkid=62741502N49031bac7a18310692f89115&l nm=79373&afid=Slickdeals%20LLC&ref=tgt_adv_xasd000 2