JOOLA's go-to pickleball paddle for rec players, the JOOLA Essentials Siren response polymer core with fiberglass surface provides great pop. This paddle is great for pickleball beginners who are just starting to develop their strokes. FEATURES: Fiberglass Sandblasted Surface is more flexible than carbon fiber on contact, creating a greater rebiund effect fpr powerful returns NFC chip enabled to autheticate paddle and extend warranty Honeycomb core structure that provides durability and play consistency