This Osprey Stratos 34 Backpack is a durable, highly ventilated day pack. It holds all your essentials for the day with smartly organized pocketing, from extra layers to hydration, this pack offers plenty of space. It features an Airspeed Suspension that lets you fine-tune the fit of the pack while providing ample airflow on the back panel. Explore new places, whether that's in the woods or a city, with this pack.SB11