Blank Pork Pie Felt HatPurist. Timeless and with no frills, this compact pork pie with diamond shaped crown knows how to impress. The narrow brimmed hat is made of crushable and water repellent wool felt and will win you by its appearance and also its complete functionality. Entirely without grosgrain ribbon trim and brand pin, the small wool hat certainly has the makings of a classic. With padded fabric lining band.