Description of Osprey Xenon 70 Backpack - Women's A new addition for spring 2008, the deluxe custom fit Osprey Xenon 70 backpack is the women specific counterpart to the Argon. Gender specific harnesses and hipbelt combos maximize comfort for shorter trips through the backcountry while its AquaSource ReCurve keeps you hydrated. The Xenon 70 is an excellent choice for backcountry adventures that are shorter in duration. Features: AquaSource ReCurve in the pack AquaSource ReCurve on your back Convertible top pocket / lumbar pack Fabric side pocket Front panel zipper Pack-to-body interface Sleeping Bag Compartment Stretch woven front pocket Stretch woven side pockets and straps XS: 3900 cu.in. (64L) - 4lb 15oz (2.25 kg) S: 4100 cu.in. (67L) - 5lb 3oz (2.35 kg) M: 4300 cu.in. (70L) - 5lb 6oz (2.45 kg)