With this unique multifilament, Babolat delivers a seductive combination of comfort and control. The comfort comes from the core, which is packed with flexible polyamide (nylon) filaments. The control comes from the outer wrap, which features glass beads to create a stiffer, more durable string. Babolat also finishes the surface with a silicon coating to enhance snapback and further improve durability. Combined, these features result in an impressive multifilament, one that not only delivers arm-friendly comfort but also allows you to swing bigger when loading the ball with pace and spin.