LIKE NEW Handy in town, on trails and for short hikes away from basecamp, the REI Co-op Flash 18 pack cleverly converts into a stuff sack when you turn it inside out. - Breathable, stretch-mesh shoulder straps have fold-over padding that softens contact with your neck and shoulders - Back panel is lightly padded; pad slips out for use as a sit pad - Hipbelt and sternum strap can be detached to save weight - Hydration-compatible design includes a hose exit port and an internal sleeve for a reservoir (reservoir not included) - Single-handed, quick-pull drawcord with small weather flap seals top - Pack exterior has a zippered pocket and daisy chain with ice-axe loop - Exterior loops can be used to lash on extra gear, add compression or tie the Flash 18 to a larger pack