Get the longest life out of your Wise Owl Hammock and protect it from the elements. The Wise Owl Defender Sleeve is a durable, waterproof, Rip-stop nylon sleeve designed specifically to protect a hammock from wind, rain and sun exposure. It works with all hammocks and is a simple and effective product that prevents the need to have to set-up and then take down your hammock after each use. Just slide the hammock sleeve to one side and boom you’re ready to go.