Step 1. Get an old pair of jeans and a t-shirt.

Step 2. Cut out the pattern on the jeans and t-shirt

Step 3. Sew the cut patterns together, nearly all the way around the perimeter with the shirt on the outside of the denim.

Step 4. Turn inside out

Step 5. Sew all the way around (this closes the hole too)

Step 6. Sew the sides shut to hold your shoelace/string.

Step 7. Test fit.