Tecnifibre razor code 200m blueThe Tecnifibre Razor Code is a monofilament co polyester string and offers an optimal mix of spin and durability. The Razor Code plays softer than traditional polyester strings, has more power and provides excellent shock absorption. The string contains a co polyester core and has a round shape. This string has ThermoCore technology, which increases elasticity for more power and a softer feel and the technology also provides extra shock absorption.