"Characteristics of colloidal cotton: The rubber surface is coated to ensure control, but also has a fast ball speed, and the use of horizontal and vertical extrusion, through more elastic rubber particles to enhance the sensing permeability of the sleeve Sponge features: The use of new high elastic sports sponge with special adhesive bonding, so that the integrity of the rubber is more strengthened, and the market ball arc is longer, reflecting good performance"