Features FastLayer Core FastLayer delivers exceptional feel and ball speed. And new for the 10th Generation, we have lowered the compression for superior flight on low-lofted clubs. Spin Skin with SeRM A coating with flexible molecular bonds digs deep into Wedge and Iron grooves, maximizing spin for more control and more stopping power. 338 Speed Dimple Pattern Less drag and more lift boosts overall distance and accuracy, even in the toughest wind conditions.