The PTX Bivybag II is a technical, waterproof bivy bag for two people designed for planned bivouacs. It is made of waterproof Ripstop nylon, has heat-sealed seams for protection against the elements, and breathable Powertex fabric on the top to reduce moisture condensation. The hood is equipped with a practical drawstring for attachment to branches or rock faces. It also comes with an emergency whistle. Top side made of breathable Powertex material, which significantly reduces moisture condensation. All seams are completely heat-sealed. Waterproof nylon Ripstop material for full protection against adverse weather. The hood has special drawstrings for easy attachment and securing on rocks or branches. Emergency whistle.