Genuine Black Sheepskin and Tan Rabbit Fur Trooper Trapper Aviator Hat Very Soft Hat - Both the Black Sheepskin Leather and the Tan Rabbit Fur Are Extremely Soft. Other Hats May Be Made with Pig Skin: This Hat Is Real Sheep Skin Super Warm -- the Hat Has Warm Poly Fill to Keep Your Head Extra Warm on the Coldest Days This Kind of Hat is Known as a Trooper Hat, a Trapper Hat, a Bomber Hat, a Bombardier Hat, or an Aviator Hat The Letter Sizes Run Small, So Order One Size Larger Than You Would Normally Wear. To Determine Your Correct Size, Take a Tape Measure or String Around Your Head. Adjusting for the Small Size, These are the Correct Sizes To Order: Medium (6 3/4, 54 cm, 21 1/4"). Large (7, 56 cm, 22"), Extra Large (7 1/4, 58 cm, 22 7/8"), XXLarge (7 1/2, 60 cm, 23 5/8"), XXXLarge (7 3/4, 62 cm. 24 1/2") Ear Flaps Can Be Put Up for Better Hearing and the Cheek Flaps Can Be Snapped Together Over the Head for a Russian Look.