Does the fibre emerge at all from the cotton or sateen covering?
Not at all. The japara cotton and sateen are both quite densely woven fabrics and we have had no experience of the alpaca fibre emerging through the covering. The only [indirect] experience of this occurring was when the manufacturer could trace the emergence of the fibre to an enlarged needle hole rather than through the japara cotton or sateen itself. We have no direct experience of this in the many duvets we have supplied.