KATABATIC GEAR Wren BivyKATABATIC GEAR Wren Bivy is an ultimate versatile bivy which gives you full control in any conditions. On warm, clear nights, zip open the mesh panel for maximum ventilation. When the weather turns, simply close the Pertex Quantum Air panel to block wind, spray, and mistkeeping you and your quilt protected. Like Katabatics popular Pion and Bristlecone bivys, the Wren features a waterproof ROBIC nylon bathtub floor and a highly breathable, water