[Jon]

I just happen to have those exact same 5mm OMER socks that you were looking at and they keep my feet warm just fine. I also have 5mm socks from Elios and they work very well too. As you can tell from my picture I am not diving in the tropics and they have worked out well for me.

If you get opencell socks be carefull. I had a set and my feet would slip around in them something horrible. Next pair I bought I made sure were nylon on both sides. They still kept my feet toasty warm, and I could actually walk to the divesite in them!

Jon