Review on Premium DANISH ENDURANCE Classic Merino Wool Beanie: Unisex Cuffed Knit Hat with Recycled Materials for Men & Women by Logan Tripp

I don't know why they say these fabrics are tested by Danish Olympians. If they are treated, they are little tested. I wore this while going through the mail. About 36 degrees. Didn't wear it on the way back because it didn't work. I ordered to put it on the head, the knitting stretched so much that the holes were big enough so that it didn't hold the heat on the head. No hat was as good as a hat. She also crawls a lot. Don't cover your ears for more than a second or two. So I returned it. I would not recommend this hat to a grown man.