I've used bamboo batting and haven't had a problem with bearding at all. There must be different quality of bamboo batting brands. I stock up on wool and silk batting every year at Paducah quilt show. It's so much cheaper at shows. And I use it for all hand quilting during the year. I buy a bolt of Warm and Natural cotton batting at Walmart for most of my quilts. I have some of every batting. When it's on sale I buy it. I don't care for the black batting.