Of the many choices available from Camelbak, the Hydrobak Hydration Pack is among the smallest, making it an ideal fit for those with a smaller torso, or those who desire convenient hydration for short workouts. A slash pocket holds those small but important items, such as a cell phone and keys. For those who've never tried a hydration pack before, the Camelbak Hydrobakή is a good place to start. Repeatedly people say that the Hydrobak is so comfortable they forget that they have it on, except when they need a drink. For a women's specific fit, be sure to take a look at the Camelbak Charm Hydration Pack. It's similar to the Hydrobakή but has a narrower shoulder profile. Durable, easy clean Omega HydroTanium٠reservoir is durable and leakproof. External reservoir access makes filling easy 90 degree bend of the Ergo Hydrolock positions Big Bite٠Valve for easy bite and sip drinking Hydrolock Shut-off Valve assures that the delivery tube does not leak between uses Reservoir includes HydroGuard٠antimicrobial technology Soft, mesh shoulder straps Includes sternum strap for stability Reflective details increase safety in low light situations Reservoir capacity: 50 oz./1.5 l. Dimensions: .5 x 8 x 1.75 in./34.3 x 20.3 x 4.5 cm Weight: 3 lbs. 15.5 oz./1.8 kg with reservoir full, 13.5 oz./.38 kg empty