The Ninox Winter Top Shield is an add-on accessory that provides instant 4th season protection for your Ninox Hammock. It mates perfectly to your Ninox Single or Double Layer Hammock. Just unzip the Insect Shield, remove, and then zip in the Ninox Winter Top Shield - Easy! It weighs just slightly more than the Insect Shield (~1 oz), but that's because we added vent-able windows at all four corners to help minimize condensation! You'll be able to add the Ninox Winter Top Shield to your Reward during the Post Campaign Survey - so stay tuned!