Pile Field Cap
The olive drab pile field cap consists of a wind-resistant, water-repellent, poplin outer shell with a pile lining, a flexible visor, which can be worn up or down, and pile ear flaps with an drawcord closure. It was designed for wear in extreme cold. 
- CAP, FIELD, PILE, O.D.
- 73-C-16350 through 73-C-16375 
- MQ-1 pile field cap: the visor lining was eliminated.