Heirloom?? Wool is quickly becoming our most sought after batting, because of its soft and luxurious feel. Heirloom?? Wool is a light weight, breathable batting that is great to cover up with. Hobbs wool batting is made with the finest washable wool in the world. It is spray bonded to provide added durability and resist bearding and migration. Shrinkage of 0-3% and may be quilted up to 4" apart.