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Osprey Packs Manta 25 Hydration Pack - 1300-1500cu in

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Item # OSP0193

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Item # OSP0193


Osprey sized the Mantra 25 Hydration Pack for solid daylong adventures and incorporated tons of thoughtful details to keep you comfortably on the move. Fill the reservoir and pack layers, camera, and lunch inside—then strap any extra necessities under the outside straps. A rotating bite valve is accessible from any angle so you don’t have to play an extended game of tag with your straw.

  • Built-in shoulder strap magnet holds your bite valve right where you can reach it
  • Mesh backpanel supported by LightWire incorporates air vents so you don’t get bogged down by the sweaties
  • Mesh-covered, perforated hipbelt provides stability without sacrificing comfort
  • Main compartment stows larger necessities—don’t get caught without spare layers
  • Zip stow compartment keeps smaller stuffs organized
  • Helmet attachment daisy chain gives you a spot to hang your climb, bike, or ski helmet while it’s not in use
  • Integrated rain cover comes out when the clouds let ‘er rip
  • Included 3-liter reservoir holds enough water for a major day out

Tech Specs

Claimed Weight:
(small/medium) 1003 g, (medium/large) 1009 g
Locking Bite Valve:
Reservoir Volume:
3 L
Recommended Use:
tough day hikes, mountain biking, peak bagging
Manufacturer Warranty:

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Go Osprey

    I've only used this pack for short day hikes so far, but I really like it. Lots of accessible pockets for all your stuff, and a decent amount of storage in the main compartment. The straps are comfortable and the mesh back is a really nice feature on a hot day. One thing that stands out on this bag is the hydration system. There is a separate rigid compartment for the bladder that fully separates it from the rest of your gear and keeps the bladder upright at all times. It is so easy to pull out and fill, and the magnetic clip on the chest strap for the mouthpiece is genius

    I have two questions. 1) I'm 5'11" with...

    I have two questions.

    1) I'm 5'11" with an 18" torso and ~33" waist. It seems I'm kind of on the border for sizing between the s/m and the m/l. Should I go with the s/m or m/l even though the m/l is for 19+" torso? I'd like to have the full 25L capacity if possible, but of course I want it to fit properly as well.

    2) Is the 25L capacity legit? Some are say it is much smaller than that. Just wondering what you guys think.

    1. I ended up buying the S/M and it fit perfectly.

    2. The 22L of the S/M seems about right. I have a 19L and I can tell there is a little size difference, but it isn't much. The capacity is a little odd due to the frame bending into the main body of the pack. It is a convex shape internally so you have a wide space at the bottom, narrow in the middle, and wide again at the top in the main body.


    Love it!!!

      I needed something with a little more room then the camelbak mule nv which I really liked.So I took a chance on the Osprey Manta 25 and I am NOT disappointed.First thing I noticed was the material looks alot lighter and thinner which really concerned me since I'm pretty rough on my packs.My first hike with it was through some rough arizona thorny brush.I really thought I would find it shredded when I took it off.To my suprise however,not even a scratch.
      My other concern was getting ice into the kinda flat blatter and fitting it back in the pack.Again,no problem.And the magnetic feature is awesome.The bite valve is right there and easily re-attatched even while riding my dirt bike.
      This is by far my favorite day/2 day pack so far.Plenty of room for all my survival gear,water,spare cloths...etc.Just can't say anything bad about it.


      Awesome short hike pack

        This pack is awesome for hiking. Pockets in all the right places, adjust-ability of the straps is good. Hydration system is one of the best features for this pack. There is a frame/netting back piece that keeps direct contact of the pack off of your back; this feature helps from getting sweaty back. Beware though, the internal storage of the 25L is pretty limited due to the construction of the back piece and shell that protects the bladder.
        I used this pack while skiing and it wasn't ideal. Mouth piece and hydration tube froze up pretty good... For skiing or winter activities I will be purchasing the Osprey Kode 30 or 38.
        Bottom line: great pack for hiking, not a huge amount of storage, may consider sizing up.

        Awesome short hike pack

        I have been looking for a backpack to serve...

        I have been looking for a backpack to serve a dual purpose, outdoor recreation and a school bag. Is this bag wide enough to fit a full-size textbook in the main compartment?

        Absolutely, if you look at the pics up there, Mr Judd has a fuel bottle turned sideways, and what looks like a chow kit with a plate. Unless your book is gigantic then you should be good

        I wouldn't use if for a school bag. You might fit 1 text book in there but not very easy. I have the Manta 20 and I know that 5 more liters wouldn't be big enough in it to fit a text book or 2. I'd shoot for the manta 30 if you want to use it for both.

        Does anyone know if you could take out the...

        Does anyone know if you could take out the bladder and store a netbook in the pocket instead?

        Except for the lack of traditional "Laptop padding" I don't see why not.

        you could it would be hard fit for most netbooks tho


        Love it for hiking

          I bought the S/M size of this pack (I'm 5'-2") to replace the camelbak l.u.x.e. hydration pack womens 520, which I found to be too small and uncomfortable. I like how this pack lets my back and shoulders breathe, doesn't bow outward in the back, and holds everything I need for long day hikes in rough terrain. I usually keep an extra layer inside, some snacks/lunch, maps, compass, knife, headlamp, hat, beacon, and a big Nikon D90 DSLR camera. The pack is a little bit heavy compared to other, similar sized packs, but the great design, rigidity, breathability, and comfort of the pack makes up for the extra weight and I would rather carry this than a lighter, sweatier pack.
          The hip belt pockets could stand to be better designed because the way you need to pull the zippers to fully open and close the pockets requires 2 hands. The side pockets are a bit small and would be hard to fit a water bottle in, but with the 3L reservoir I have never needed extra water and instead I use the side pockets to stash maps and zippered-off pant legs. It would be nice if there was an option for an insulated reservoir and tube to use during winter. None of these are deal-breakers for me though.
          Overall, a very well thought-out and designed pack.


          Great Day Pack

            I must say that I am very impressed with this pack. Osprey makes some of the best packs on the market and this is no exception. It is very sturdy, not to heavy, and has their awesome airspeed back panel. I was pretty set on getting a Talon 22 until I saw this pack and all the features that it has.

            The only thing is that the rain cover it comes with is kinda big for the pack, but with the draw chord you can get a pretty good fit with it. Just to let you know that the rain cover covered my wife's Osprey Aura 35 PERFECTLY...just to give you an idea of the size. I like that you can fully remove the rain cover from the pack giving you some extra storage space if you know its not going to rain.

            The pack is a little narrow, and you also have a small hump in the main compartment due to the airspeed suspension, but this was not a big deal to me.

            Do not hesitate to order this pack from Backcountry....its awesome!

            First Look Osprey Manta 25

            Here is my first look at the pack that I purchased. It is an Osprey Manta 25 and I think I am in love. This panel loading hydration pack is ideal for light hiking and multi- sport adventures. It has dual zippered side access
            vertical slash pockets, dual stretch woven side pockets with InsideOut
            compression, 3 Liter HydraForm Reservoir. it is made out of 70x140D Nylon Shadow Check. The medium large is 25 liters or 1500 cubic inches. It also includes a rain cover for when the weather turns ugly.

            Osprey's website says this pack should be...

            Osprey's website says this pack should be able to pack about 15-20 lbs. Has anyone maxed out the weight in this pack? At what weight does this pack start to suffer or the shoulder straps begin to bite? I have heard reports that claim the pack is uncomfortable over 10 pounds (which is pretty light considering the 3L of water is 6.6 lbs already).

            Also, would I be able to fit a padded DSLR camera, zoom lens, rain coat and a few spare items in the main compartment? How big of a water bottle can the side pockets securely hold (500/750/1000mL)?


            You need to figure for the weight in the 3L of water for sure. I haven't maxed out this pack, but the hip and shoulder straps are not beefy enough to hold more than 25 lbs total weight comfortably.

            Does this pack have the suspended mesh...

            Does this pack have the suspended mesh back panel that will keep my back super-duper cool?

            it does keep you cool


            Avoid if you're a big guy

              The pack is great, except that it is way too narrow. I'm 6'2", and the part where the hip pads go out are so close together they are pressing into my lower back instead of being around my hips. Makes it uncomfortable if I have any weight in the pack or I'm wearing a tshirt. Good pack, would recommend if you are a lanky person, but any broad chested guys should avoid it


              Avoid if you're a big guy

                The pack is great, except that it is way too narrow. I'm 6'2", and the part where the hip pads go out are so close together they are pressing into my lower back instead of being around my hips. Makes it uncomfortable if I have any weight in the pack or I'm wearing a tshirt. Good pack, would recommend if you are a lanky person, but any broad chested guys should avoid it

                Unanswered Question

                what are the internal dimensions of this...

                what are the internal dimensions of this pack?


                Pretty good pack

                  I'll echo some comments from previous reviews first: good quality pack, seems very sturdy, but not heavy. Nice ventilation, and good amount of storage for a hydration pack. The little waist belt pockets are kinda gimmicky, I could see fitting a small point and shoot camera in there, or a knife/multi-tool, but not much else.

                  I agree that it's STUPID that osprey didn't include a detachable hose (so I had to go out an buy a splice for about 6$ and install it) but the bladder seems of good quality, and havent had any leakage problems yet (fingers crossed)

                  If you really cinch up the rain cover you can get it to stay but it is finicky, would have made sense to have a bit of a lip at the top, but the shoulder straps come right to the top, making it hard to keep in place.

                  All in all a good pack that I would buy again, but do yourself a favor and get a hose disconnect aftermarket.

                  ohh also I am 5'10" and I got the M/L but could have got the S/M... I think I'm kind of on the border in terms of height FYI

                  Can you please post a link to the piece and maybe explain how you did it for those of us who'd like to copy your idea? Thanks!


                  Osprey, you are capable of so much better!

                    Sorry Osprey, I generally love your stuff and was excited to get this pack, but you just got too many things wrong on this one (back it goes... thx bc, you guys rock!!).

                    I just returned from hiking on the Napali Coast on Kauai with this thing. While there were some very nice aspects to this bag (nice overlapping front side zip pockets, hiking pole stow&go system, helmet, light lash point, pretty comfortable, stayed cool without excessive arch away from back, etc.), they were overwhelmed by the following list of gripes:

                    1) Nearly worthless waist belt pockets. Too small to hold more than a couple of peanuts, or a bus pass. To make matters worse, they lose most of their tiny volume when you cinch down the waist belt... I find this location the most convenient place to keep GPS, camera, phone, snacks, etc for ready access... Why can't someone make decent sized belt pockets... not that hard to keep them out of the way, and even include some kind of cinch system to keep things from flopping when the pocket is not full... Also, make 'em watertight!

                    2) Side stretch pockets are located way too high for non-contortionists to be able to reach water bottles/snacks.

                    3) Fancy new water bladder. While I liked the idea of the scaffolded bladder and was willing to put up with some additional bulk, I think Osprey could have optimized these with less material to make it lighter and less bulky. All of that structure and a drinking tube not readily removable from water bag add up to make the thing even harder to clean than older style bags. Worst of all, unless I was extremely careful when screwing on the cap, and getting it mega tight, the thing leaked all over my stuff (and, embarrassingly, the hotel bed).

                    4) Rain cover. Nice to see an integrated one attached, but no way I found (granted it was under flashlight in pouring rain) to firmly attach it to the top of the pack, despite integral bungee. As a result, whatever stuff hadn't already gotten soaked by bladder cap leakage, was doused when the rain cover kept falling off!

                    All in all, this pack made a tough hike, quite annoying.


                    Oh yes, this hydration pack works!

                      This is a great day pack-it has already proved itself. The bladder system works easily, slides in with dedicated space for a day's stuff- light rain top & bottom, xtra layer, 1st aid kit and trail food. I actually bought an extra 2L hydration insert to go with the 3L that comes with the pack so I have more flexibility. Bite valve works well but be careful of the magnet locator- keep it away from your compass! This is a light pack and the pockets on the outside provide good flexible stowage. The trekking pole loops work well and the integrated rain cover is a plus. You get what you pay for- this is Osprey and worth the $$. I'm very pleased with this purchase.


                      Very nice!

                        Good streamlined day pack. Could be used overnight in summer with the right gear(See my upload). Bladder system is amazing, slides in easy even when full. Bite valve seems pretty loose and I think it will leak, hopefully not bad. Light pack with a bunch of pockets on the outside and even an integrated rain cover that comes out of the bottom. Pretty expensive but considering it has a top notch hydration system and rain cover, I don't mind paying that much for osprey. Very happy with the purchase, I have no doubts that the manta will be my go to day pack.

                        Just wondering, what is your back length and what size did you get?

                        Hey Stephen did the bite valve or any other part of the hydration leak? Please advise.

                        Sorry for the slow response. You probably no longer need an answer, but I will give it anyways. The bite valve did leak, but you can turn it at a 45 degree angle when not in use and it will rarely leak after that. Kind of a hassle though. No Idea on my back length. I am 5'11"-6' and the M/L fits great. I would say anyone over 5'9.5" should be getting the m/l.


                        Packed with a full bladder of water, a small summer sleeping bag, cooking set, stove, sleeping pad, two fuel canisters. Large enough for a very minimalist overnight trip.