Upgrade your Camelbak bag with the Crux 1.5 litre reservoir. This particular reservoir lowers your centre of gravity compared to the regular Camelbak, making you more agile on the trails. Easy to fill because of the large round opening, and easier to clean as well. The drinking reservoir is made using the strongest materials and sturdiest parts in the industry, and was extensively tested in the CamelBak laboratory under extreme conditions. CamelBak is so convinced of their Crux water reservoir and its perfect integration into your hydration system that they provide you with a lifetime "Got Your Bak" guarantee.