New O'Brien Men's Large Hinged Neoprene Life Vest for Water Use Grey Black Blonde The X Philosophy: Spider X 350545.9090 Wmn Blk Ryl Med The X Philosophy: Spider X revolutionizes the way we achieve optimal stability and alignment by reengineering the mass properties of the head and introducing a new optically engineered True Path Alignment System Increased Stability: Spider X features a redesigned head with a steel frame that is 30% heavier to minimize twisting The X Design: New True Path Alignment System helps visualize the intended target line for improved putting accuracy which makes for some tremendous power Perfect for boating water and paddle sports