During his promotional tournaments in China, Jan-Ove regularly impressed the fans with his unique class playing with the COPPA JO GOLD. As this one is designed to meet the expectations of professional players - this means the sponge of the Coppa J.O. Gold is relatively hard. Donic has developed also a softer version of the COPPA JO SILVER. This is a rubber that most players feel very comfortable with, especially European players. COPPA J.O. SILVER is considerably softer, but due to its high built-in speed-glue effect, it plays like a medium-hard speed-glued rubber. DONIC COPPA JO SILVER combines excellent control, very high speed, and spin that is very close to that of professional speed-glued rubber sheets.