Comfy Slippers part one

I am attempting to make some slippers for DH for Christmas.

These are his old favorites that were tosssed out (or so he thought).

I took one apart and labled each piece noting how the slipper was sewn together. Then traced out my pattern pieces. Now here's the problem - how do you get the comfy sole and soft cusioning, I tried batting but it was not enough.

I found these insoles at the local Walgreens and at $2.79 a pair, they are gonna fit the shoe (so to speak). I plan on using batting and the insoles. A plus they are washable insoles, way to cool.