We used to use these in the late '80's early '90's and they were fantastic! Did'nt know you could still get them but i'd recommend them to anyone.
http://cgi.ebay.co.uk/NORWEGIAN-COM...8298203QQihZ013QQcategoryZ11484QQcmdZViewItem
Basically, the Norgy shirt (roll neck with zip) was designed to go next to the skin, these were designed to go over the top of them in really cold weather. I remember they were top notch and, at this price including shipping, could make an interesting alternative to a Swannie.
http://cgi.ebay.co.uk/NORWEGIAN-COM...8298203QQihZ013QQcategoryZ11484QQcmdZViewItem
Basically, the Norgy shirt (roll neck with zip) was designed to go next to the skin, these were designed to go over the top of them in really cold weather. I remember they were top notch and, at this price including shipping, could make an interesting alternative to a Swannie.