Camelbak Octane XCT Backpack Lightweight Construction - Formed from lightwieght rips stop fabric and stretch mesh construction. Adjustable shoulder strap - Contoured with a mesh back and fully adjustable to provide a highly comfortable fit. Adjustable waist strap - With a mesh back and built in zip locking pockets. Antidote Reservoir - One of the best on the market with a multitude of features. Hydration Capacity - 100 oz / 3 L.