This is Finn The Human Ear Flap Hat, by Level Up Nerd Apparel. This pattern has now gone live, and my pattern page now links to it. This crocheted hat requires knowledge of both increases and decreases, as well as being able to place markers and knowing how to count your stitches. This pattern can work up very quickly. I was able to finish this over the course of two days. I used Cascade Yarns Pacific, 268 yards, which is an acrylic yarn. I found that this yarn was the right thickness, and was soft enough to be around the head and face. When making a hat, using a yarn that will be itchy or scratchy will mean a hat that is never worn.