I spent a lot of time choosing between different materials and fur, and settled on the Shearling Sheepskin Trapper hat because it had a leather shell, full fur interior, snaps instead of strings, snap storage for the chin band and adjustable headband. I was tempted to purchase this on the "A" site, but did not want to risk getting a knockoff, and thought it would be better to purchase from the source and support the company directly. I read that the hat sizing tends to be slightly smaller, and I have a 22 1/4 head (which is medium on this size chart) but I decided to choose the large, because it had the headband tightener just in case the fit was loose. Upon arrival, the large size fits my head perfectly without using the tightener. I chose the skeepskin because it is warmer than rabbit fur. My only criticism of this hat, is that I wish Overland offered this black leather shell with brown or grey fur :)