This is a Wool & Silk blend carpet.  By adding 10-15% Silk, the rug RESISTS dust.  The silk fibre enables the wool to last much longer, making this rug a lifetime investment.
 
The pile is a blended fibre and the Wool gives it a deeper pile - and at a lower cost, as it is quicker to weave than pure silk.
 
The Silk is natural and from Mulberry tree silk worm cocoons.