I'm looking for a (preferably) two-part (9 + 4.5 tog) duvet that's genuinely lightweight. I'm pretty debilitated and my muscles are wasted so trying to cope with my current ten-ton one is becoming a problem. If I search on 'lightweight duvet' on Amazon, say, it comes up with plenty but I don't see any specifications about weight to back up those claims. I'd like to know what the duvet actually weighs before I order it. I'm also looking for one that's quiet! A lot of people seem to complain that the fabric is stiff and that it crackles on some of these things. Is there any quick way to narrow my search?