Features Synthetic One interior slip pocket. Four exterior zipper pockets, two slip pockets Includes bag rain cover Description Product Description The second generation of the Sirrus Series continues to offer unparalleled design and features in a ventilated daypack. We've simplified the fit with two torso sizes that match the fit range of Osprey's women's specific styles. Styling and materials have been upgraded as well. These packs are full-featured and ultra-comfortable, providing versatility for a variety of adventures.