I bought this to wear under my headgear at night to provide a cushion between my CPAP head strap and my head. It's a very nice cap and I really like the color, but it's kind of loose fitting and stretches a little too easily.  It doesnt stay in place very well. I would like it better if it fit more snuggly and didn't stretch so easily. If I were wearing it under normal conditions to keep my head warm I think it would be fine as is.