Someone gave me an old original ThermaRe
It’s still airtight and in good shape. Must be about 25 years old, too.
But I don’t like the 3/4 length, so I use a Women’s 66"-long ProLite-4 pad (packs very small and is the perfect length for me) for kayak camping. Car camping gets the humongous 2" thick original luxury pad (from 1995 and still going strong).