The Osprey Stratos 36 is a trekking backpack for your most extreme hikes and demanding days. This model has a perfect size to carry all your essentials. Its top-loading design, topped with a fixed top lid, helps make packing a breeze. Plus, with its highly ventilated AirSpeed suspension system and just enough volume to power through your biggest activities come rain or shine. Made from 100% recycled materials. Osprey Stratos 36 trekking and mountaneering backpack