I have been looking all over for a black turtleneck sweater.  I finally found this one on Amazon. I live in San Francisco and this is not only perfect for the weather, it also can be dressy enough to go out for dinner.  The fabric is nice and a bit stretchy so it keeps it's shape. In reading the reviews regarding the size, it runs a bit large - but I would more likely say "comfortable." I am an older guy and today's large seems skinny to me.

This is a great addition to my wardrobe and I will probably purchase one in another color in the future.