The RB MAX is an entirely new ball for Mizuno. It combines a Tour ball's speed and launch characteristics with a more durable cover. Created using a new DualCore with a soft inner to enhance feel, with a firmer, resilient outer, allowing greater energy transfer. The RB MAX also features Mizuno's AXIALFLOW dimple to reduce drag - for enhanced distance and penetration through the wind. TECHNICAL DETAILS 336 AXIALFLOW Dimple Dual Construction Butadiene Rubber Core Durable lonomer cover. Keep your game sharp with this reliable, comfortable, and stylish gear made for modern golfers who want performance with personality.