Originally developed by Dutch designer Dré Wapenaar—who was commissioned by a non-profit to make the lives of tree-sitting activists a little easier—these tear-shaped tents hang suspended several feet off the ground. Though never actually used to stop chainsaws, since 1998 they've been in use at the Hertshoorn campsite, sleeping up to a family of four on the interior platform, which has about a nine foot diameter. More recently Wapenaar's also added a bivouac for mourning the dead and an orb-shaped birthing tent (featuring a central pool) to his repertoire.

via Make

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