I always order rag wool socks for sleeping in the winter. These are the best yet! They are warm, but are not at all scratchy. They do not have those little bumps which can rub your feet and make sore spots. Bravo!
These rage socks are warm and comfy, but run very small! I am a woman with a size 8 foot and I ordered a unisex sock size medium. They were (toe to heel) about 6" long! Very small! The large size fits me but snugly. I have no idea what size sock men, with their large feet, would order.