At The Heart Of The Ball Is One Of The Strongest Designs To Date, The Asymmetrical Shape Known As The Maximum Accelerating Disc Technology (M.A.D.) That Optimizes The Shapes Of The Rg Planes To Allow You To Perfectly Dial In Your Desired Reaction.On The Shell, The Evolution Reactive Genesis (Erg) Creates A Later Break Point, Putting More Emphasis On The Backend. Look For 10% More Entry Angle, And Increased Hitting Power. See This Ball Corner Like A Ferrari®! Part Of The Storm "Premier" Line Vanilla Citrus Scented! Erg Pearl Reactive Coverstock M.A.D. Core 4000-Grit Abralon Factory Finish Suggested Cleaner: Reacta Foam12# Rg 2.59 Diff .02913# Rg 2.57 Diff .03214# Rg 2.55 Diff .04515# Rg 2.52 Diff .05016# Rg 2.50 Diff .055 Wwrd: 10/2/12