I'm looking for a cheap light weight seat. I've seen some that are made of "harden plastic" according to the seller. They appear to be drawn from sheet with tube all around the edge. 5.2kg is fairly light, though not as light (or expensive) as carbon fibre. Are plastic seats any good?

[Edited on 26-6-2010 by smart51]

Link?

Have you seen the Jaz Poly ones? Rally Design import them... LINKY