When day hikes stretch out into more committing endeavors, the Sirrus 36 women's hiking pack is the perfect in-mid-size option. Its top-loading design, topped by a fixed top lid, helps make packing a breeze. Plus, with its highly ventilated AirSpeed suspensions system and just enough volume to empower your bigger pursuits, it inspires long days and lightweight nights exploring our more rugged trails, rain or shine. Made with 100% recycled materials. The AirSpeed Ventilation system features an adjustable injection-molded suspension system with 3D-tensioned mesh for breathable support and a great fit. The Comprehensive Fit system includes a taller, wider frame geometry combined with a molded ladder torso adjustment system to extend the fit range. An included raincover keeps the pack and gear dry in inclement weather. The top-loading design has a secure drawcord closure and an internal hydration sleeve with a hose port in the backpanel.