Molehill Kids Shelled Bomber (aviator style) Hats are made of an exterior shell of durable Teflon-coated waterproof breathable nylon. Plush polyester fur makes these hats comfy while the hook and loop closure under the chin keeps the wind out. Thinsulate fill for better insulation and less material. Coordinate with all of our shelled mitts, snow mocs, jackets, snowsuits and summit bibs! ABOUT MOLEHILL MT. EQUIPMENT: Since 1994, Molehill Mt. Equipment has concentrated on offering the highest quality infant, toddler, and junior apparel reminiscent of the top quality products from the adult outdoor sporting goods industry. Our apparel lines stress a layering concept and offer technical fabrics and functional features. SIZING: Small - 14.5-17"; Medium - 18-20"; Large - 19-21.5". Measure circumference of head with measuring tape. All measurements in inches. PLEASE BE AWARE THAT DUE TO LIGHTING, THE COLOR OF SOME GARMENTS MAY APPEAR DARKER/LIGHTER IN PERSON THAN THEY MIGHT APPEAR ON YOUR MONITOR SCREEN.