In Reply to: buying mattress posted by darwindudes on Tuesday, 9. August 2011 at 19:48 Bali Time:
full sheets of foam relatively cheaply and just get a local tailor to knock up a removeable and washable cotton cover.
All thicknesses and density available at different pricing (fixed)
I have bought in Denpasar and also at a wholesalers outlet next to Animale on Jl. Imam Bonjol.
You would get two small ones out of a sheet of foam.