nostr:npub106dam65ww9ztdqj26xvh08dyuc7lj7nmkrtrujwsmyq2n6g3r33saq3m89 yes I believe so. The particles are almost the size of kitty litter but they have the weight of styrofoam, so very low density. That being said, if I put in a piece of iron it's still too hot to touch nearly 6 hours later, so the insulation value is excellent.

https://media.clubcyberia.co/pleroma/e80759ce7ca114fa53719574bb7e98d27a6df8e0cdaa2c832cfc103083e0b587.jpg