The Xanadu 4 is a roomy fully-featured 4-season shelter that offers serious weather protection unparalleled space-to-weight ratio and superb durability. Features a generous vestibule and full-length side vent for good air flow. Reflective stake out loops keep you from tripping in the middle of the night and hydrophilic thread at the seams expand when wet—sealing the seams and eliminating the need for liquid sealant.