I see they have added a third type of spearo fin to their range this year (and several new spearo masks in black/camo & a new snorkel in black or camo), the
Fibrex with fibre glass blades for "deep diving".
Genesis fins are described as "tecnopolymer" (i.e. plastic) for "deep diving".
The
X-Pro fins are simply described as "Randonflex" and "softflex" (plastic?).
...and another new fin, the
X-Flex, a more pedestrian-looking (i.e. shorter) snorkelling fin (I would think). Also made of various plastics.
2008 catalog:
http://www.seacsub.it/download/APNEA2008_IT_EN.pdf