I love love love this hat. When I first picked it up, the light fabric feel like it wasn't going to be as warm as it is, but it fits so snugly around my head that I've had no problems in weather from 20F-40F. It is the perfect hat because it stretches enough to fit a ponytail, but still remains tight around your head and doesn't slip.
This is the best hat for winter running I've ever purchased.
I lost all my hair from chemo three years ago and it has never come back. These hats have helped me so much. They are soft and lightweight and perfect for running (I'm a runner) or keeping my head cozy at night when I sleep. They are not too thick or heavy. Please never stop making these caps, Oiselle. In fact, the more color options, the better.
Along with being super soft and stretchy, this beanie actually fits my enormous head! Until now I have only ever owned running headbands because most hats sit about mid-ear level for me and won't go any further down. But this one has more than enough space, heck I could even still fit a bun into the hat and still have it go down to my eyes. I LOVE IT!!