Whether used to mark crab traps or protect your boat's hull at dockside, a Promar PVC Foam Float is a great, economical choice. Made of resilient compression-molded, closed-cell PVC foam, this durable, bullet-shaped float resists punctures and won't absorb water. Multipurpose design; great for crabbing or mooring Molded from buoyant closed-cell PVC foam Resists punctures and won't absorb water.