Step 1: Materials
Spray adhesive (You could try using glue)
Foam ( I used Walmart camping pad)
Step 2: The Base
Step 3: The Foam
Step 4: The Duct Tape
Step 5: Start of the Strap
Step 6: Attaching the Strap
1. Take a long piece of duct tape and fold it in half length wise so that it is skinnier than it used to be. (The basic idea for this step is that you do not want to have sticky stuff exposed on your foot strap.)
2. Take your duct tape strip and fold it into a "W". (i.e fold it in half then, then fold it up in the opposite direction so that it looks like the letter W) You should make the middle part of the "W" only as high as the upside down "T" is.
3. Now place the middle (the ^part ) of the duct tape "W" on the part of the T that is sticking up.
4. Now it's time to tape the strap on the sandal. The best way to do this is to wrap tape around your W/T so that they are stuck together. After you do this it should look like a V. Now you want to take the ends of the V and wrap them around to the bottom of the sandel. (before taping it is advisable to check and see where the best fit is for your straps) Then tape the ends of the straps down and add another layer of duct tape for extra hold.