Here is the story, especially about the unraveling other customers mentioned. I bought a dark gray and light gray pair to fight off the frigid early mid-Atlantic coast weather in early January. The light gray pair is and was perfect. One of the dark gray pair popped an elastic and started unraveling the first time I wore them. HOWEVER, I emailed the company and they were excellent in customer service. They offered me my money back immediately or a new pair. I loved the light gray pair (fit, weight, texture), so I asked for a replacement pair of the dark gray. They sent them right away (took about a week to get to me from China), and I have worn that new pair successfully (and laundered it) 4-5 times since then.  So - beware when putting them on that you might get a defective warmer, BUT if you do, the company will refund or replace -- and they are my favorite pair of leg warmers (I have many). If I had not had to replace one, the rating would be a 5.