Our Radar MASH Hat continues to pay homage to Radar O'Reilly while bringing a bold splash of color and function to any adventurer's winter garb. The jersey knit outer shell uses Alpaca's naturally insulating and thermo-regulating properties to keep you comfortable and warm. The inner headband area is lined with microfleece, to block the wind and keep the hat fitting well season after season, adventure after adventure. The top of your head will still be able to breathe and exchange moisture through the alpaca jersey knit, keeping you comfortable, even if you break a sweat working out in the cold. U.S. Grown, U.S. Made Alpaca - This hat is designed, cut, sewn, dyed, and finished right here at NEAFP in Fall River, MA.