When dark clouds gather over the horizon while we're hiking long trails, the Osprey Downburst 36L Backpack keeps us from having to turn back to the parking lot in a hurry. The IPX5 waterproof main compartment keeps our cargo protected from heavy showers, and the quick-drying external materials don't take long to follow suit once the sun starts shining again. The 36-liter capacity holds plenty of gear for long day hikes, and the front compression pocket keeps extra layers easily accessible while we're on the go.