USAPA Rules
2.E.1 Material. The paddle must be made of any
material deemed safe and not prohibited by
these rules. The paddle shall be made of rigid,
non-compressible material meeting the criteria
located on the USA Pickleball website.
2.E.6.f Springs or spring-like material, flexible membranes or any compressible material that creates a trampoline effect.
Austin Kim, Product Manager at JOOLA. The “Propulsion Core” was engineered to create a “catapult effect”