These socks are hand knitted by the staff at Salamanca Wool Shop. They started as the by product of the Learn to knit sock class. Knitted in 8ply yarn they are just then item on a winter evening curled under the blanket watching tv and need to keep your feet warm. When it is bedtime, no need to take them off - feet are toasty warm all night. Who needs an electric blanket when you have these socks.