These are my first socks that don't make my feet sweat. The first few weeks are too tight. At this point it's loosened up enough to be close to perfect. You really don't need slippers with this product. One of my best buying experiences in a long time. Hardly shows any signs of wear after a few months. This is a great sock for air travel. For the first time in 15 years, my feet no longer sweat and are constantly cold.