SnakeSkins are an instant stuff sack system that collapses your Hennessy Hammock in about 30 seconds. Your shelter never touches the ground, never gets dirty or muddy. It just disappears into two tapering tubes of silnylon which sit gathered on the ropes at each end of the hammock for amazingly quick set up and take down. For use with all Hennessy Hammock models. The 70 D poly hex fly requires an additional pair of snakeskins because the hex fly is bulkier than the standard rainflies.