For severe allergy sufferers I recommend the spundown range.  The pillow is filled with non-allergenic polyester ball fibre and may be washed at 60^oC the temperature that kills dustmites.  Use a matching spundown duvet and enclose your mattress in an anti-allergy mattress protector for complete peace of mind.

For those who would prefer a natural filling the @nite range of natural (down & feather) duvets and pillows has been designed specifically with housedust allergy sufferers in mind. They are also washable at 60^oc.