Here you can add a vinyl insert to your order. You need this to secure your monofin. At the moment I can only offer you this in a thickness of 2x 0.6 mm. This is fine for photography, but you will definitely get better results with thicker vinyl. On YouTube you will find great instructions on how to quickly make your own vinyl inserts!
For swimming, I definitely recommend a thicker one.

The production time for the vinyl inserts is 2 weeks and will then be shipped together with your fin. Please keep this in mind when ordering!