Carhartt Men's Fleece Hat

Q: Can this be used under a motorcycle helmet, or is it too thick?

This winter hat may be too thick, but it all depends on the person wearing it.

Q: will itfit under a hard hat?

I think it should might have to adjust your hard hat a little.

Q: does it cover one's ears? i want a cap that does not cover the ears.

I have a very large though not freakish 7 5/8 head, and this is the only fleece cap I have found that fully covers my ears. That includes hats with multiple sizes up to so-called XL. So please for the love of everything - if you are reading this Carhartt - do not make it smaller.