Tulsa Drillers Script 59Fifty Style Cap. Dark Royal Blue in color (Dodger Blue color) with white embroidery and a button on top, this New Era 59Fifty features the Drillers primary logo found on our home and alternate jersey. This cap is made of 100% Polyester and comes in sizes starting at 6 3/4 and going up to 8. This is NOT an on field cap.