Steel wool
wool feels like soft white stuff. and it looks like well wool
Angora
sheepskin is soft warm and durable
The wool feels soft.
A fine soft goat wool in 8 letters is Cashmere.
Because of the wool.
A sweater
yes
a soft substance made out of wool or a sheep
A soft warm fabric is flannel
The modifying word you may be looking for could describe the source of the fleece used in the wool. Soft wool comes from baby alpacas, llamas and yaks. There may be other sources, depending on your definition of 'soft'.
it is cosidered to be the best variety of wool because 1. it is soft and comfortable