Specs: Capacity: 18 oz / 535 mL Weight with bottle: 2.14 oz/60 g Technology: Rigid ExoSpine(TM) creates superior hand feel and support for the soft flask Features: Soft flask with bite valve Flask can be easily removed from sleeve Ergo-designed hand strap with no-slip grip fits hand seamlessly Breathable wicking mesh under hand position provides maximized grip Stash pocket for small essentials BPA-Free construction