The Grand Trunk The Air Bivy Extreme Shelter is a brilliant combination of a few of Grand Trunks products: a mosquito-proof hammock, the Funky Forest Tarp, and the Hammock TreeSlings Hanging Kit. Put these three elements together, and you have an unbeatably versatile ultralight shelter system. The Skeeter Beeter Hammock gives you a comfortable spot to rest or sleep along the trail or in your travels, and its bug-proof mesh upper half keeps biting buzzers away. The included Funky Forest Tarp offers waterproof protection from the elements, and you can easily hang it above your hammock with the help of its guy lines and the TreeSlings hanging kit.