Osprey Packs Kestrel 38 Backpack Osprey's stow-on-the-go trekking pole attachment is designed to quickly attach and carry trekking poles while wearing a pack An integrated and removable rain cover protects your gear from foul weather. It stows away in its own external pocket at the bottom of the pack An external reservoir sleeve is located behind the shoulder harness Allowing easy Loading/unloading of a hydration reservoir The zippered sleeping bag compartment provides easy access to your sleeping bag through the bottom of the pack Side zippered access allows easy accessibility to the inside contents of the pack's main compartment