Tecnifibre NRG2 16 1.30 660' Reel tennis string is designed for maximum power with maximum feel through the use of PU and Elastyl® fibers with an SPL coating. This string uses PU (the same material used for cushioning in your shoes) to dampen shock for a soft. comfortable feel. Whether you suffer from arm pain or you're just looking for a powerful. playable string. the Tecnifibre NRG2 16 1.30 660" Reel is a must-try.

• PU inside has 400% elasticity for ultimate comfort and dynamic performance.
• Multifilament Synthetic string.