SPX65 SDM 65% carbon. Practically Indestructible.The SPX65 mast is now the lowest carbon content mast in the Neil Pryde range with 65% carbon content. Thanks to the added fiberglass prepreg layers in the lamination process it is virtually indestructible. Use of fiberglass results in considerably thicker walls making the mast immune to ovalization under compression as well as very resistant to impact damage. In weight it is very close to the previous FLX70 range. SHARK SKIN TPX and SPX masts are finished using Neil Pryde's unique, “Shark skin” surface texture layer. This low friction surface finish prevents wet materials from sticking to the mast surface and reduces friction.