Innovative yet traditional, the Sirrus women's hiking pack brings premium comfort and quality to the world of perfectly ventilated backpacks. The new Airspeed back system is inspired by the popular AntiGravity™ system. The enhancement is a wider, taller and stronger frame in one size just right for the female body. New adjustable torso length improves ventilation. All for your ultimate comfort. Classic styling with modern color combinations and fabric made of durable, recycled, high-strength nylon with bluesign certification are sure to please. The 24 and 34 litre backpacks have a zippered entry. The 26, 36 and 44 litre backpacks are accessed through the lid. And the new 44-litre model offers multiple entry options: through the side zip, the canopy or the lower sleeping bag compartment.