Syloxi is a proprietary silicon hairspring developed by Rolex, introduced in 2014. It is crafted from a silicon and silicon oxide composite, which provides significant advantages over traditional ferromagnetic hairsprings. The Syloxi hairspring is designed to enhance the precision and reliability of watch movements by being insensitive to magnetic fields and stable under temperature variations. This innovation is part of Rolex's Caliber 2236, initially used in women's watches. The Syloxi hairspring features a patented geometry that optimizes isochronism and chronometric regularity, ensuring consistent performance across various positions. Its design includes a flexible central part for attachment without glue, maintaining flatness and concentricity. The hairspring's reinforced crescent-shaped end allows for a two-point fixation, ensuring it remains centered and free of mechanical stress. This advancement represents a significant step in watchmaking, offering improved accuracy and resilience in timekeeping.