Duramix string is the first string to feature a mix of polyester and polyamide fibers, impregnated with melted polyurethane. This unique configuration provides a real boost in control while maintaining a good level of comfort. This string offers: A good level of playability, thanks to its multifilament construction. A good level of arm protection, thanks to the use of Polyurethane (HD) whose flexibility is set to 100% A good level of control, thanks to the use of polyester fiber, stiffer fibers, which deform less on impact. String made in France. Polyester fibers (50%): Generates a firm touch and durability for players looking for extra controlled power. Polyamide fibers (50%): Improves ball speed and touch. HD PU: 100% elasticity to match the rigidity of polyester. It will provide additional comfort. SPL coating: Anti-abrasion coating for greater resistance. Also guarantees good glide to ensure the "snap back" which provides more lift. BEST SELLER IN FRANCE Dedicated to young players or adults looking for more control and a longer lifespan.