blades are made of (surprisingly) very dense carbon weave. very durable, been spearfishing with them at sea for a couple of months now and my blades get scratched a lot when hit by rocks but no cracking or any structural damage so far. blade angle makes surface swimming relatively easy. I selected the medium stiffness and it works great for me. Only issue is that the foot pocket size is larger than I expected (Im size 8.5, ordered size 8-9), I ended up using 5 mil socks to make the foot pockets fit.

Fast shipping & well packed and the support team answered to all my mails, perfect !
Those fins are really confortable and they got a nice carbon "kick". I ordered them in stiffness 2 (I would rather you to go for a stiffness 3 if you're used to carbon fins).
They are defenitely worth it.

very pleased with these fins. comfortable footpockets. high quality carbon blades and they are hand tempered to perfection. great value for money