Product Overview: Marathon Golf Balls - 15 Pack Maximize your distance and ball speed with Srixon Marathon Golf Balls. They're designed for all swing speeds and offer medium spin near the green and mid-to-high launch angles on full shots. Features: Energetic Gradient Growth core technology is highly resilient and delivers exceptional distances 2-piece construction Lonomer covers with a 333-dimple design stand up to harsh elements Polybutadiene cores provide an excellent feel