Inflatable rear mattress for a TJ?

If I wanted to sleep in my TJ, I'd rather use a Jammock. I actually got one as a gift a couple years ago, but haven't really used it, except as an emergency mini-soft top when I get stuck in the rain without my top on, lol!

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https://www.quadratec.com/products/...xLymBWRYxKuNs6NWK-XlwcnZzuiQtAihoCz5UQAvD_BwE