Fairfield WDR9020, Nature-Fil™ Wool Quilt Batting, 100% Sheep's Wool, Size: 90" x 20 yards, Natural Fairfield’s Nature-Fil Wool quilt batting 100% sheep's wool has a medium log and is bonded to make a soft, light batting that's easy to needle and drapes beautifully. Warm and Lightweight, machine on gentle cycle once quilted. Recommended quilting distance 2"- 4". sheep's wool. Bonded to prevent fiber migration. Quilt up to 4" apart. Estimated shrinkage 2% - 3%. It's amazing....like butter.  If you have never quilted through wool this is the perfect way to try it out.