I have some fibre insulation that was used for packaging, it says it’s sheep’s wool, I was wondering if it could be used for fibre art. It’s grey and brown in colour.
I know a lot of people use it as core wool for needle felting - I have tried it and it felts well but is not my preference. Would work in an emergency though 
My daughter made insoles for her slippers from some of that 
I use wool as stuffing for my knitted christmas decorations and pin cushions.