Wilson Staff’s new Zip Golf balls gets its name from the fact that the compression core is so soft that it registers a “zero” on compression testing equipment. Wrapped around this is a high velocity mantle layer, and a resilient ionomer cover. The mantle gives th eball its power. The ionomer cover delivers touch and spin. The dimples are flat bottomed and shallow, in what Wilson offers as a unique design. In all, Wilson says, this ball offers a great combination of soft feel, distance and control.