Azapa,
I've just put in an order for the millenium greys which are soft. Omer Millennium Winter Full Foot Fins (Dive Gear / Fins)
Spaghetti give a good description of them in His post in this thread. Sounds like they might be too soft for Your requirements.
The omer millenium runner that You are talking about is a hard fin by all accounts that requires a bit of leg power, it might be too stiff in 12 C. But like Spaghetti says some guys are using them in cold water.
I've just put in an order for the millenium greys which are soft. Omer Millennium Winter Full Foot Fins (Dive Gear / Fins)
Spaghetti give a good description of them in His post in this thread. Sounds like they might be too soft for Your requirements.
The omer millenium runner that You are talking about is a hard fin by all accounts that requires a bit of leg power, it might be too stiff in 12 C. But like Spaghetti says some guys are using them in cold water.