From Electrum’s website: Meet the paddle that revolutionized the game: the Electrum Pro. The original design out of Silicon Valley features groundbreaking technology to provide you with consistency, power, spin, and control. The Electrum Pro features an 11mm Honeycomb Polypropylene Core which provides an edge to edge sweet spot across the paddle face. The RAW Toray T700 carbon fiber face provides a superior level of spin, giving you a competitive edge while remaining USA Pickleball compliant. This paddle also features an ergonomic genuine leather grip that is moisture resistant to help with sweat and keep your grip feeling natural and comfortable.