My husband has Raynaud Syndrome, so since we live in the northeast, I am always on the lookout for things that will contribute to his hands and feet staying warm and dry.  These are a nice additional layer to go under his warm socks in the cold weather. They help to keep his feet dry, which helps them to stay warm longer. I would recommend these to anyone who has issues with cold feet. My husband has not complained all winter about cold and damp feet.