Outdoor Research - 20 L Helium Adrenaline Day Pack. Color Titanium/Slate. Low Stock. $138.95. 4.3 out of 5 stars1 left in stock+2Brand NameOutdoor ResearchProduct Name20 L Helium Adrenaline Day PackColorTitanium/SlatePrice$138.95Rating4Rated 4 stars out of 5(3)