Mares Razor Matrix Freediving FinsRazor Matrix Freediving Fins The Razor Matrix freediving fins are made with a combination of carbon fiber and glass fiber layers. The blade has a width of 20. 5cm and a length of 65cm . The variable thickness of glass fibers allow high performance in kicking. Features: Blade produced with pre impregnated carbon and glass fiber layers New 3k carbon with 90 crossed fibers Improved blade reactivity thanks to a lower number of crossings between fibers