Sober, technical and comfortable, the SIRRUS 36 backpack by Osprey brings innovation and quality to the ventilated bag segment. The Sirrus 36 is a women's trekking backpack, which is particularly appealing for its comfort. Indeed, with a stretched AirSpeed back, it promises excellent ventilation to keep you dry even when the mercury is rising. This back panel is also adjustable, for perfect customisation. All of this is of course tailored to the female body type. The main compartment is accessible from the top, the bottom and through a side zip, making it easy to find your gear. There are also several small pockets for keys, valuables, water bottles and a water pouch. The rain cover is integrated and there are also Stow-On-The-Go buckles to hang your poles when not in use. The Osprey SIRRUS 36 is a very complete women's model suitable for day or two-day hikes.