XCEL Mack Segmented USCG Approved Vest 2008: The Xcel Mack Lifejacket is a U.S. Coast Guard (USCG) –approved vest designed and engineered with segmented panels for protection and maximum torso flex. The Mack Segmented vest features pliable foam covered by flexible neoprene for the best-possible fit, and super lightweight, high-impact foam with closed cells that don’t hold water. Sporting the Xcel Mack Segmented USCG Approved Vest will keep you above the water after you take a nasty spill on the wake, while simultaneously looking good.