Well, it's a wool hat so I where it in the winter. It's pretty comfortable. It rides high on the head so if you are used to wearing ball caps it will feel kinda weird at first. I seen a feller in the grocery store about a year ago and he was wearing a (non wool) summer time version. I wish I would have asked where he got it.
Clan McKay meself, although family lore says we were "improved" via the Emerald Isle.
Edit: tried to link to Paddy Kelly's Brew on YouTube but was blocked... sorry.