I tried out some of the felt wool that I got from my friend Irina to my birthday. I made a big yellow doily out of two skeins and felted it in the washing machine with 40º. To my surprise it didn't change much. (you can see it in the before/after picture) The size is still pretty much the same, but it looks a bit felted and the curves became prettier. I think I will try to felt it again with higher temperature and spin speed.