Boston Red Sox Fenway Park '47 Officially Licensed Citgo Bucket Hat - Kirby. The Kirby '47 Bucket is a relaxed bucket hat with a fitted crown, draw cord, and flat embroidery on the front. Made from garment washed cotton twill. Relaxed Fit, Garment Washed, Front: Flat Embroidery Logo, Draw Cord, Cotton Twill. The classic Red Sox hat has an update with a Boston Landmark.. Perfect to keep the sun out of the eyes of Red Sox fans, has a neck draw string to keep your hat on your or around your neck so you'll never lose it. Cotton Twill