The Crysallis has a unique wire-stiffened dome shape over your face which provides for comfortable usage and rain shedding in foul weather. A rear facing tunnel vent in the hood allows for good air flow and ventilation when the Crysallis is fully zipped up. An 82" continuous waterproof zipper with two sliders allows the top fabric to be unzipped and peeled back from the top of the head to waist level on both sides. The top is fully backed by no-see-um netting for a refreshing bug-free sleep on dry evenings. The Crysallis is ideal for trips where you will be sleeping fully stretched out.