The innovative yet traditional Stratos 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. Improvements include a wider, taller and stronger frame in one size. New adjustable torso length improves ventilation. All to increase your comfort. Classic styling with modern color combinations and made of durable, recycled, high-strength nylon fabric with bluesign certification is 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.