The Camelbak Arete 18 Hydration Pack is a minimalist daypack for a short trip around your day camp or final ascent of your climb. The amazing thing about the Camelbak Arete is its versatility. You can use it as a lightweight hydration pack or, if you have need of tougher or more spacious backpacks, convert the Arete into a reservoir sleeve to be placed within a larger multi-day pack. Providing 2 liters of hydration capacity, the Antidote reservoir within the Arete 18 can fold into its own pouch for ease of travel. On its own or as a reservoir sleeve, the Camelbak Arete 18 Hydration pack is a pack that will come in handy wherever you go.