<p>You can use any sort of unspun fiber, but for economy's sake, I'd go with a relatively unprocessed fiber. You don't need it carded or combed for stuffing, just clean, and it's not hard to clean it yourself. You could look for wool <a href="http://www.etsy.com/listing/60544961/scoured-corriedale-fleece?ref=sr_list_1&ga_search_query=wool+fleece&ga_search_type=supplies&ga_page=&order=&includes[0]=tags&includes[1]=title&filter[0]=supplies" target="_blank">fleece</a> or <a href="http://www.etsy.com/listing/61411885/half-pound-raw-romney-wool?ref=sr_list_22&ga_search_query=wool+fleece&ga_search_type=supplies&ga_page=&order=&includes[0]=tags&includes[1]=title&filter[0]=supplies" target="_blank">raw wool</a>. Batting works, but you'll be paying for the processing. Here's wool stuffing from <a href="http://www.weirdollsandcrafts.com/waldorf-dollmaking-supplies/wool-stuffing.html" target="_blank">Weir dolls</a>. <a href="http://www.magiccabin.com/product.asp?section_id=0&department=0&search_type=normal&search_value=wool&cur_index=&pcode=175" target="_blank">Magic Cabin</a> has some at a good price.</p>