I was tired of freezing my face neck and ears off in our cold warehouse while driving machines around all night.  Got this on Wed afternoon and took it to work with me because if it's 15 outside its 30 in the warehouse.  Put this on first thing before I started the night.  Being thin I thought I was going to be cold all night but I was WRONG.  It kept my head nice and warm all night long and not to hot to the point of me wanting to take it off.  It's thin enough to breath through.  It will keep your neck nice and warm.  I would buy another if I lost this one.  Great product and kept me warm all night long in our freezing warehouse.