This is mohair stuffing which is similar to wool stuffing.  This is sold in 5 oz bags for $5.00.  This is loose short fibers and is not in a batt.  It is clean of dry matter but there are threads and strings.  This material is fire-retardant, hypoallergenic, antibacterial and it packs very well.  It will stuff differently from polyester so there is a small learning curve but once you get used to it you will be very happy with the results.  It works really well for thinner fabrics.

5 oz fits easily in a 10"x12" bag.