Fincover (how to make a decent one)

Before select I had Tectonics, and yes the tectonics fincovers are very good. Tough, stick on the vin. But I sold all tectonics exept for 1. A few months ago Caspar finished 2 speedfins for me. No covers, so finally a excuse to make a bunch of vincovers for my own. Asked my mother and she made 10 covers in less than a hour. With a normal sewing machine. Now my fins are protected onshore! And I like the look of a 'wooden' fin

Doesn't mean the fins will last forever since I am quite a pro in finding stones @ the bottom.