My little girl is swimming only with their mermaid fin around, making it so happy - I wanted that too ... but for my size gäbs probably only Walfluken ... so I've decided to use as a monofin and was lucky: Super-fit - simply pure and slip into the water with diving goggles. You would not believe how nice it is silent underwater ;-) the worm swimming motion (actually dolphin, only without arms) is the very best against the Hausfrauenkreuzweh in the lumbar region - Oh, I can only recommend - wenns 10 stars would be, I'd get the fin 11 ,