If you mean Seal Skinz, yes they are excellent, I recommend them. They will keep your feet dry and warm and cosy - with one exception:
If you step into anything deeper than the top of the sock - easily done in wild country - water will quickly get inside and fill them up, irrespective of whether you have your trousers tucked into them or if you're wearing gaiters. Once they've got wet inside from something like that, they will not dry out, so your feet stay cold and uncomfortable for the rest of the day, and the socks will stink like rotting cardboard.
They feel just a tiny bit stiff and hard, not quite as comfortable as ordinary woollen socks on the feet, or meraklon inners and wool outers, but it's only a little difference and I still think they're worth having. They're quite thick but not thick enough for me to wear on their own, so I put a light-to-medium pair of loopstitch wool socks on top of them.
When you wash them they take a long time to dry, but I've found it's quicker if you peg them on the line turned inside out.