I hand quilt and I love working with wool batts. It just quilts like butter and has better loft than cotton. It will also be warmer as the fibers trap air. It will wick moisture and retain up to 50% of it's weight without feeling wet. As for moths, the do not like plant fibers and will not be inclined to chew through in order to have a meal. The finishing processes tend to discourage felting and make a batt washable. When in doubt, quilt a sample and treat it roughly the wash to see what happens. It takes water, heat, and agitation to make felt so that is why it is recommended to dry flat. These conditions cause the scales on the fiber to interlock/ felt.