I am so glad I got this on sale so I could afford to get two. Dig this, I am running outside, it's a partly cloudy 30 degrees. I have on a base layer tshirt, a base long sleeve, both are thin and spandexy, and the Freeze. I'm out 40 minutes, On the home stretch, I look to my right because something shiny or white catches my eye. It's FROST on my shoulder!! The thing was wicking and warming so well the sweat froze on my shoulder and upper back but I was still warm as pie. I say, 'Get it'.