NRG Core

NRG+  core's are lower density Polypro Core's. This Low density PP Core's designed to have the lightweight strength & stiffness of Polypro core but with more flex like a PE Core.  NRG Core is rated at 1.5lbs PCF (Per Cubic Foot)
It is made upo of D12 (1.2lb) PCF with a layer of 1.9lb PP to give more stiffness & stop elbow dents,
This means NRG is lighter than PP as the Polypro Core cells are larger & less dense. This is the choice of core's if you want a more flex for cold water or a performance board that has more flex. This core is also great for kids or women as it is much easier to control.