Tension Tech Polypro Core.
Tension Tech Polypro Core's are designed for more stiffness than a Polypro Core. This is created by adding a top mesh sandwich layer between two layer's of 1.5mm IXLPP crosslink. This allows a thinner polypro core without sacrificing strength. This core excels in warmer water's & get's little to no elbow dent's. A great choice for anyone wanting a thinner board or one with some extra stiffness.