Took them on my second run and they worked. Im sure the hat would be just fine for someone with a normal sized head. even so, Ill probably go back to Plantronics. It seems to fit fine 43")Top to bottom 2. I have very wide feet and there was no rubbing or blisters, very lightweight, like wearing slippers. Great bluetooth speaker i will do more listening on the speaker and will update my review. That said, if you dont like "in the ear" earbuds this is not for you. I accidentally spray painted the big obnoxious “ROOF RACK” logo and installed the wind breaker backwards so you can’t see it at all. Now its mounted on my wall it looks amazing it looks like art