Split Fins Probably the biggest choice you have to make is whether to go for a solid fin design such as the Mares Avanti Quattro fins, or a split fin such as the Tusa X-Pert Zoom fins.

The idea behind split fins is that they make it easier to fin underwater - they do this by having a less rigid body which obviously offers less resistance to the water. This does usually mean less raw power although the increased efficiency (less effort) can make up for this. Also unless you happen to dive in conditions where you have to fight a current often, this isn’t really an issue.

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