Are there speakers with cloth/soft enclosures instead of wood?

There was the Acoustic Precission Eikos FR-1 produced some time in the 90s and the result of a collaboration between Tom Evans, Patrick Handscombe (presumably not the cricketer) and Ted Jordan in the UK. It was a single driver in a polystyrene foam box with a thin skin on the outside. It worked very well when I heard it at Tom’s place in Wales and my local hifi shop carried it for a while but I don’t think it sold that well. People prefer something more substantial for their money it seems. The finish wasn’t very robust I’ve heard. 

Vandersteen Model 1,2, and 3

Q: What is the sound of one hand clapping?  
A: Depends how fast.

What are you talking about you have been home to long.

So - speaker in free air = one hand clapping? On the other hand (!) a box is a problem too? Sorry. Home too long.
On the same note, why wood? Why not granite, cement or something super-stable? I remember when that was the fad.