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Go lighter and smarter.

As you can see with the Mantra 20 Hydration Pack, Osprey thinks differently: to it, a hydration pack is a full system that not only quenches your thirst for optimal performance, but organizes your gear in a thoughtful manner. Though the smallest in the Manta series, it provides the full set of features, but in a lighter, more compact construction. It boasts the advanced HydraLock frame that makes packing your reservoir a breeze and a magnetic valve holder for quick and frequent sips. AirSpeed suspension and a BioStretch harness distribute and stabilize the load for maximum comfort, and plentiful pockets and organizing elements, including a padded sunglasses pocket and trekking pole carrier, keep everything tidy for speedy access.

  • AirSpeed mesh backpanel supported by LightWire frame incorporates side vents so you don’t get bogged down by the sweaties and ridge foam to keep your back happy
  • BioStretch harness features perforated EVA foam with large holes for enhanced breathability and comfortable stretch lined with soft, breathable spacer mesh
  • Stretch sternum strap has magnetic hose clip for quick and easy access to life-sustaining water
  • Mesh-covered BioStretch built-in hip-belt transfer and stabilizes load, breathes via perforation, and features a modified, straight ErgoPull closure
  • Rugged and light 70 x 100D nylon shadow creek and 600D polyester fabrics withstand outdoor wear and tear
  • Integrated rain cover comes out when the clouds let loose
  • Ample 3-liter Hydraulics reservoir features an integral framesheet to keep water close to your body and prevent barreling, a rigid handle for easy insertion into pack, and wide-mouth cap for easy filling and cleaning
  • MPE film in reservoir ensures taste-free water and is durable enough to handle hot water
  • Hydration sleeve allows direct access via zipper for loading in a hurry
  • Zippered stretch mesh hip-belt pockets secure small, quick-access items, stretch mesh front and side pockets let you quickly stash extra gear, and zippered, embossed sunglasses pocket protects your eyewear
  • Dual side compression straps keep load lean and close to body for a stable haul
  • Helmet attachment loop gives you a spot to hang your climb, bike, or ski helmet while not in use
  • Stow-on-the-Go loops secure your trekking poles out of the way when not needed

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Osprey Packs Manta 20 Hydration Pack - 1220cu in

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Here's what others have to say...

5 5

Perfect day pack!

  • Familiarity: I've used it several times

I Love this pack! Just the right amount of room for all my supplies & rain jacket. The 3 liter bladder is easy fill and slides in perfectly! I love the magnetic part on the mouth piece to keep it in place while hiking and the built in rain cover is super convenient to make sure everything stays dry. I couldn't be happier!

Mt. Si, Washington

Mt. Si, Washington

After reaching the base of Mt. Si's summit before the Haystack. Overlooking the cities of Bellevue, Seattle, and North Bend.

5 5

Best Day Hike Pack

  • Familiarity: I've put it through the wringer

Have used this all around Western Washington's day hike peaks including Mt. Si, Rattlesnake Ledge, Mt. Pilchuck, and many others. I was able to fit the ten essentials with a water reservoir that is perfect for day hikes. I have also used this pack for going to the climbing gym to fit my harness, belay devices, rock shoes, and chalk bag. Anyone looking for a lightweight hiking pack, this is it.

I see that the new 20L version is 'one...

I see that the new 20L version is 'one size' only. How does it compare with last years M/L in torso length?

Responded on

Measurements for the M/L are:

19.5" x 9.5" x 8.5"

With a empty weight of 2 lb. 4 oz.