This US sourced, wool filled, cotton covered comforter is hand crafted right here in Minnesota! The wool is carded and tufted so it resists migrating and provides a breathable, temperature regulating, dust mite resistant experience. The wool is also dust-mite resistant and unlike down, will not create little dusty feathers all over your bedroom. The wool is then covered in 100% unbleached 230 thread count cotton muslin. Select from three different weights of wool batting for the most comfortable experience.