Featuring a sleek two-tone black and white color, Babolat RPM Dual is the most durable member of the RPM family. This is because Babolat adds a titanium co-polyester material to the original recipe for greater resistance to abrasion. In additional to outstanding durability and above average tension maintenance (for a co-poly), we found this one to be slightly firmer and lower powered than the original RPM. For this reason it is ideal for big hitters who are looking for maximum control. Topspin players will not be disappointed. Like the original RPM, this one is made with a slippery cross-linked silicone coating to enable the main strings to slide out of position and then snapback with vicious force. The result is heavier spin with less effort. If you are looking to for big spin combined with exceptional durability and control, this string is a great option.