Sandals for warmth

Step 2 Trace a pattern

I used a pair of flip-flops as a template for mine.  You could use your own foot or make a rectangle that fits your foot.  Just trace or draw the shape you want on the bottom side of the piece with the Sharpie. 

The pair of flip flops you see the bottom of in this photo have a "thong" between my big and next toe.  I don't like how that feels with socks... otherwise i might just have settled for these quarter inch thick insulators on my feet.