Glen Berry designed the unique X-Series mouth reeds with great success. He used this proven X-design and evolved this concept into the new Golden Dome with a contoured elevated design to help produce the realistic elk sounds of bugles, grunts and cow and calf mews! Easy to use and effective. Sound like the real thing and produce those perfect tones with the NEW Golden Dome! The large bull reed has two layers of latex to help produce more volume.