Never used (original packaging) osprey sirrus 24L hiking backpack. Great bag, just too big for me. From website: AirSpeed Ventilation - Adjustable injection-molded suspension system with 3D-tensioned mesh provides breathable support and great fit and carry Comprehensive Fit - Taller, wider frame geometry combines with molded ladder torso adjustment system to extend fit range Included Raincover - Keeps pack and gear dry in inclement weather Panel loading design with a burly #10 zipper delivering wide access to main compartment Internal hydration sleeve with hose port in backpanel Item Dimensions: 21.7H x 13.4W x 9.4D in; Item Weight: 2.73lb