Second Service Bigpack 20 X12 M String Reel

After one and a half years of development, Isospeed presents the most sustainable tennis string in the world: made from 100% recycled PET from a regional supplier. This ensures a good conscience on the court as well as the usual excellent feel.

DOUBLE HEATING: The second heating process
The second heating process compensates for irregularities and eliminates internal tensions.

PRE-STRETCHED: Pre-tensioning of the string core minimizes tension loss.

LIQUID WAX: At the end of the production process, the string is finished with a layer of wax. This makes it easier to string the racket and significantly increases the durability of the string, due to reduced abrasion.