@quiltedsunshine ... I can understand you'd be disappointed if the batting disappears! But not sure what you mean ... it gets thin? Or it shreds apart? or?[/QUOTE]
It's like the batting dissolves. There's nothing but air between your two fabrics. I guess that's why it drapes so nicely. Try quilting a sample, then washing it.
One of the ladies I worked with accidentally used the bamboo batting, thinking it was an 80/20. As she was loading it on the store's longarm, it was coming apart and fluff was allover in the air. It irritated her eyes so badly that she went to the eye doctor the next day. The doctor told her that her eyes had little cuts allover them. We have to assume it was from the bamboo batting.
I bought a pair of bamboo socks and they fell apart after 3 washings.
I'm just not a fan of bamboo textiles, I guess.