Neat little hat. I usually wear med/large hats (depending on brand and hat sizing) and many times am frustrated by not being able to find a hat that will cover my ears (I have a nice OR Peruvian Hat...) and this one does just that. I fits perfectly just bellow my ears, and still out of the way of my eyes. I was worried it wouldn't fit when I first saw it, but it is quite stretchy. It makes a great liner for under my other had when really cold or on its own for high output. The fabric is comparable to Icebreaker 200 or a regular cotton t-shirt in thickness. As it is wool it will be less durable than synthetic hats (I was wearing IB 200 wool baselayers over Pat Capilene 2 when I jumped out of my tent, slipped on ice and bashed my knee into the ground, the wool got a tiny tear, the synthetic didn't).