Osprey Mira 32

Osprey says:
With 32 liters of volume, this women's-specific Mira is a premium hydration daypack designed to offer outstanding, fully-featured performance without compromise. Made to go the distance on your most committing hike adventures, it has loads of space for all your gear, all packaged in top-tier sustainable fabrics. Its highly-ventilated AirSpeed(TM) suspension has been improved with a molded ladder torso adjuster and it comes with a next-gen reservoir.