Abstract: A string for a sports racket includes a core formed of a plurality of core filaments of nylon which are twisted together in a first direction and which are impregnated with a thermoplastic polyurethane resin, a moisture-cured polyurethane layer enclosing the core, a reinforcing layer formed of a plurality of reinforcing nylon filaments which are disposed side by side in annular rows and which are twisted about the polyurethane layer in a second direction opposite to the first direction, and a sheathing layer made of a mixture of silicone and nylon resin and covering the reinforcing layer.