Hi,

I have the same allergy. I use special covers for all mattresses, duvets and pillows. I have cases that are covered with a soft terry fabric. The others can get a little squeaky.

I got mine a while ago in the US, not sure where you can find them here, but this product is similar to what I have, and mine is great.

http://www.amazon.com/CoverAll-Mattr.../dp/B0014GR0FM