Potential aerogel application: low-VOC washable waterproof sleeping pads

"Are there any closed cell foam sleeping pads with an R-value of 3 to 4? Tips on hacking non-inflating pads to make them more winter proof?" (2023) r/Ultralight https://www.reddit.com/r/Ultralight/comments/16h19h1/are_the...

What is the difference in R-value of (sleeping pads) with these materials?

- Add high R-value reflective tape to the ground side

- Add a mylar emergency blanket -like windshield sunscreen below the pad

- Double the (closed cell foam) pads

- Add aerogel to the (closed cell foam) manufacturing process

- Add aerogel to XPS Extruded Polystyrene

Criteria: Recyclability, Washability, Waterproofness, Mass, R-Value,