The slippers are felted and on the drying rack.
The big blue slippers, knit with Sirdar Softie, a 50/50, wool/acrylic blend, required 24 minutes in the machine and are not a great felt at all. For slippers they will do. But for a bag, a hat or mittens, they would be a reject.
Lesson learned. I thought I could make that yarn do what I wanted it to - but not so. The off-white, Rowan Big Wool in the slippers felted quickly and well. That means the slipper opening is very tight. My nice, little, designer touch I thought so cute requires stretching every few hours,otherwise, I am not sure a foot will get into the slipper.