Buyer's GuideCovers and LinersPool Covers, SafetyULTRA-LOC® SolidSafety SwimmingPool CoversMar 6, 2015 Built with 100% polypropylene (0% vinyl) material for unmatched strength and durability, yet incredibly lightweight!Related StoriesPool Covers, SafetyBubbles walks onLoop-Loc coverPool Covers, SafetyInterview withBubbles the ElephantContent LibraryDig through our best stories from the magazine, all sorted by category for easy surfing.Read MoreBuyer's GuideFind manufacturers and suppliers in the most extensive searchable database in the industry.Learn More