If you"re just starting to add to your Seirus apparel, then you can"t forget a pair of these wonderful Seirus Hyperlite Stormsock fleece lined sock. These socks are the only ones that can do this effective a job of keeping your feet dry, so that moisture can"t build up and keep you cold; but they also keep your feet ultra-warm, and all with a fabric that"s so thin you won"t believe it!That fabric is a very thin nylon that will stretch any way your foot does, and is perfect for slipping into any boot or shoe. Because it"s so thin and narrow, you can be sure that it"s never going to bunch up and get in your way. You might have other socks currently in your drawer; but we guarantee that you don"t have any socks that are nearly as warm, or as narrow, as these ones!Hyperlite Stormsock®Features Super thin 4-way stretch nylon outer Perfect for ski boots