Wrap and Zap is the type of cotton batting you use in the microwave for bowl potholders and such.
I had never used Soft and Toasty before either. Apparently it is a new batting, when I looked up on a quilting blogger site, she tried it out and compared it to Warm and Natural and showed pictures of the two battings quilted and washed. She said that it quilted well and although it shrunk just a little more than W&N, she thought that it was a good brand and would use it again. With her recommendation and at the price they were selling it for, I was willing to take a chance.