Solinco has developed a high-performance and versatile co-polyester string designed to offer playability and control while generating extra power and spin. Hyper-G is a square-shaped co-poly string that takes Solinco to new heights. While not extremely soft., Hyper-G is still comfortable and powerful compared to other poly strings. With the shape of the string, players will notice a definite bite on the ball to add extra topspin to their shots. Endorsed by Sam Querrey and Donald Young, this string has become a player favourite in a short period of time.