The osprey ultralight pack liner made from siliconised ripstop nylon and designed for ease of use our ultralight range of pack liners are built to protect all of your gear from the elements when the weather turns wet itrsquos important to know that your equipment will stay dry our pack liners are designed to do just that to seal the contents of your pack against the rain and mud equipped with a fully waterproof roll top closure coated fabric and taped seams our pack liners ensure