M (Hat Circumference:22.4"); L (Hat Circumference:23.2");XL (Hat Circumference:24.0");XXL (Hat Circumference:24.8"). Outer material:polyester,inner material:cotton. | The earflaps, neck and forehead parts are lined with top quality skin-friendly faux fur to steer clear of the cold weather. | Front closure buckle under chin design. You can button the earflaps down to warm ears, face and chin, or can also roll it up when it is not that chilly. | The bomber hats are windproof and warm. | A perfect winter trapper hat for any outdoor activity like skiing, snowboarding, motorcycling, running, climbing, hunting or just dogwalking.