The new Fastlayer core produces extra distance and a softer feel. Spin Skin with SeRM is a new urethane coating that increases spin on short shots. Newly designed sightline also helps you aim when it’s time to putt. Srixon’s 338 Speed Dimple design gives a slightly higher launch than the Z Star and Z Star XV. The design also gives a more penetrating ball flight that isn’t so affected by the wind. Compression: 74.