This is the Helium Bivy from Outdoor Research. It has only been used once. It was used inside a large shelter, so it is in beautiful condition with almost no dirt or stains on the back. It was purchased at the end of last year. Product description quoted below: OUTDOOR RESEARCH Helium Bivy is the ideal bivy for minimalists who prioritize speed, agility, and performance. It is made with Pertex Shield for durability, a small footprint, and light weight, as well as excellent waterproofness and breathability, making it perfect for thru-hikers and backpackers.