The Chameleon Symmetrical Top Cover is designed with a Moonlight option that will completely close you into your hammock. It will also help you maintain the warmth inside your hammock on colder nights. You will be able to control how big the vent is of your Moonlight as it has two way zippers on either side. You will also have the functionality to take the Moonlight completely off or to be hooked on to operate like the breathalizer. The options don’t stop there! No matter if you like to lay head left/feet right or head right/feet left you will be able to switch your lay direction without ever getting up out of your hammock. The fabric is our proprietorially-designed ARGON 90. It is breathable yet wind resistant.