Minkee is a supersoft modern fleece material. It is widely used for baby stuff. Most quilts I machine piece have either a minkee, sweatsuit fleece, or polar fleece back because it makes them more snuggly. So my backs are usually 1/4 to 3/8" thick.
I think I have this one- but it is outside in the studio, sleeting outside so I can't verify.
http://shop.sew-classic.com/Low-Shan...tch-P60400.htm