Water Hammock Replacement Mat.Mat Includes one bungee replacement.Mat Care InstructionsFor Lake/Ocean use, the mat can be left in the water without an issue. We do not recommend leaving the Water Hammock in the pool for extended periods of time. The chlorine in regular and salt water pools will deteriorate the mat over time. One suggestion if you do not wish to take the Water Hammock out of the pool is to flip the Water Hammock over so the mat is not touching the water.