One of nature's most spectacular phenomena is the Aurora Borealis also known as The Northern Lights. Caused by geomagnetic storms in the outer sections of the Earth's atmosphere, these celestial theatrics are awe inspiring to experience. Now you can enjoy The Northern Lights all the time with these cool socks with a stunning glow-in-the-dark aurora borealis streaking through the arctic night sky. Approximately fits women's shoe size 5-10 and men's shoe size 3.5-8.5.  Content: 58% cotton, 41% polyester, 1% spandex.