Mine seemed fine but hers weren't doing the job, even wearing waterproof overtrousers, overlapping the socks etc).
On returning home, we washed and dried them and tried them again with the same results next time out.
I decided to fill both pairs up with water and lo and behold, Mrs. C's pair leaked like a sieve.
I contacted Sealskins who told me to send them back for analysis.
They tested them, agreed they were faulty and sent a new pair.
This new pair seem no better, even though they don't leak the same.
Last week I rode for 30 miles in the rain, in shorts, with Sealskins on and Goretex overshoes on.
At the end of the ride, my feet felt warm and dry but on examination the socks were wet.
I put this down to water trickling down my leg, although my shoes were absolutely soaking.
I'm not convinced that these socks are truly waterproof, although I don't mind wearing them because they do keep my feet warm, even after riding in cold rain all day.
But then again, if they're truly waterproof, that is not letting water in from the outside, then I can surmise that after pedalling thousands of revolutions during the 30 mile ride, there would be a certain amount of moisture generated within the socks (and no, I don't suffer from sweaty feet, thank you) which would cause the dampness itself.
I have a feeling that Sealskins will offer you a replacement pair Mick, but I would opt for a refund if you get the chance.
And I hope the weather will be nice and dry for your forthcoming tour and your feet stay sweet and dry.
