What Our Gearhead(R) Experts Are Saying: "The Sirrus 44 hits that perfect balance between lightweight and capable. The AirSpeed suspension is unmatched for airflow and comfort on steep climbs, and the torso adjustment makes it fit just right. I use it for quick overnights or hut trips where I want space but not bulk." From fast-paced overnights to hut-to-hut treks, the Osprey Sirrus 44L Backpack delivers the perfect mix of breathable comfort and smart organization. Designed specifically for women, this pack's adjustable AirSpeed(TM) suspension keeps air flowing while supporting up to 30 pounds with ease, so we can focus on the trail-not the load. The 44-liter capacity offers plenty of space for layers, food, and camping gear, with both top and side access points for easy packing. The fixed lid design provides extra storage and protection, while the Stow-on-the-Go trekking pole system lets us transition quickly between climbs and descents. An integrated rain cover and durable, recycled nylon construction ensure we're ready for any weather that rolls in. Whether it's a quick overnight or a multi-day mission, the Sirrus 44L combines durability, adjustability, and performance for any adventure.