In reply to SouthernSteve: Thanks Steve, but for the doc its a long, difficult process of investigation.
I have always noticed that the new variety of microfibre fleeces leave a massive amount of 'dust' in the environment, including the car dashboard. It shows up as very minute, fine fibres the same colour as the fleeces in question.
From there its not a huge leap to suspect it as a link with an asthma type breathing problem of late onset. So I am curous to know if anybody else has suspected this link.