Short bifins for spearfishing in shallow waters.
Perfect for the 5 to 10 meter zone.
For instance, these fins are used by professional sea urchin's fishermen in the Mediterranean sea.
The bifins are also used by scuba divers who are looking for efficient fins.
Composite blades to stock up on maximum energy throughout the bending.
Better strength and improved resistance to impact and crack propagation thanks to S-glass.