This multifilament has a unique construction that promotes durability without greatly enhancing the stiffness of the string

Multifilament Synthetic

or playing on hard

If you're looking for an optimal playing string that provides superior shock absorption and gut-like playability

Gamma Ball Hopper EZ Travel Cart XD (150 Balls) Training Aid Type_Tennis Trainers This multifilament has a uniqueThe EZ Travel Cart XD allows for a very lightweight cart specif ically designed for the Teaching Pro who travels from sight to sight and the serious player looking for a mobile ball carrier. With the ability to store up to 150 balls, this cart lets you simply remove the full EZ Travel Cart bag full of balls or fold up the empty bag with the cart in under 5 seconds. Carrying case included. The ultimate in portable teaching devices.*Tennis balls are not