Great fins but the buckles are brittle and can break when hit on rocks etc and are not available as a spare part. I made this one to replace the broken part, the little blue tab part you can see is pretty indestructible and has survived anything. It is a simplified design and doesn't have the push buttons at the side but it does work OK, holds reliably, easy to adjust and strong (so far).

Printed in white PLA, 3 walls, 50% infill, it works fine although I am sure it would be better in blue ABS. Needs support under the round push in tab.

It could do with some refinement - hole for the blue tab hinges could go back 1mm and bar the strap wraps around could be thicker to base, eliminating support, but it works as-is and got me swimming again.

If printed in PLA you will need to soften it in hot water to get the blue flipper part in.

LulzBot

TAZ 5

No

Yes

0,25

Three walls for a bit more strength but it works anyway