The wallet has an indent for the strap to align with, a square illusion pattern, and a notch on the side to push your cards out.

I printed this in SUNLU PLA Silk Black, these are the print settings I used, you do not necessarily have to do the same.

• 100% infill
• 8 walls
• 0.12 layer height
• 0.4mm nozzle

I cut off the side stripes from an old pair of shorts, any 25mm or shorter strap will work.