I've used two identical pallets without dismantling them. I simply cut them to fit my body lenght and cut a simple curve at the top part and cut the edges at the bottom parts. Of course I sandpapered the lot.
This sunlounger can be also flattened. The upper part has two legs attached to hinges which I took off a reused window, which can be bent in if not used. Our dog Bailey testing it :)
Then it was time for the missus to test it ;)
I think she likes it :)
My wife decided to paint it white, so be it.