The Camelback Alterra lets trail runners get rid of bouncy bottles. The super-stable Alterra carries the food and extra layers needed for an extended trail run, plus as much water as a large water bottle. Features: Easy, convenient filling with external access to the reservoir. Side cinch compression keeps load stable and secure. Velvetex waistbelt is comfortable next to bare skin and stable enough for long runs. Integrated waistbelt pockets give you on-the-go access to essentials. Bungee cinch system for overflow storage. Secure cargo pocket holds food and essentials.