The osprey ultralight stretch stuff sack 1 whether yoursquore backpacking around the world trekking a mountain range or commuting into the city ospreyrsquos new ultralight stretch stuff sacks will become a daily essential built to help organise your pack they feature dual expansion panels to accommodate and separate your gear the rectangular shape allows easy packing and maximises your space easily slotting into your pack thanks to their siliconised nylon material o