Polyester Clothesline is a highly durable rope made of low-stretch polyester. This rope will not sag or stretch and holds up well in a variety of weather conditions, including extreme temperatures, precipitation, direct sunlight and more. This is normally used to hang clothes in your yard or at your campsite. The working loads shown should never be exceeded. Never use this product to secure large flat surfaces or objects. All ropes should be replaced if signs of wear, such as broken fibers are apparent. Misuse can result in serious injury or death. Working load limit of 40 lbs. Holds knots well Does not unravel