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Osprey Manta 25 Hydration Pack - 100 fl. oz.

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The Osprey Manta 25 hydration pack offers the latest in easy hydration, plenty of pockets, and comfort that lets you focus on your adventure, not your gear.

  • Osprey Hydraulics™ system sandwiches an anatomically shaped plastic sheet between a layer of nylon fabric and the reservoir back
  • Design conforms the reservoir to the back's shape even when full, resulting in a precise, stable and comfortable fit
  • Reservoir features a rigid spine/handle that stabilizes the water load and makes it easy to slide the reservoir into the pack
  • Rigid spine/handle and large mouth make filling and cleaning the reservoir a snap
  • BPA- and PVC-free reservoir does not retain tastes or odors and features AquaGuard™ antimicrobial formula to help prevent bacteria and mold
  • 180° pivoting on/off valve rotates in either direction for quick and easy flow control; magnetic sternum-strap buckle secures the bite valve when not in use
  • AirSpeed™ suspension incorporates a lightweight alloy frame and cross struts with a tensioned mesh back panel for support and flexibility
  • Mesh and perforated, molded waffle foam at contact points along shoulder straps and hipbelt enhance breathability and comfort
  • Panel-loading main compartment is spacious enough for your done-in-a-day food, clothing and gear
  • Zippered front organizational pocket with key clip holds small items; zippered top pocket with soft lining helps keep sunglasses or other fragile items from getting scratched
  • Stretch-woven front pocket offers quick external storage and access; integrated patch holds a blinker light (sold separately)
  • Zippered side pockets carry small items within easy reach
  • Zippered pocket on hipbelt keeps small essentials handy
  • The Osprey Manta 25 hydration pack features an integrated raincover that can be quickly deployed to keep contents dry


Item 796762

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Osprey Manta 25 Hydration Pack - 100 fl. oz. Specs
Best use
22 / 25 liter
1,300 / 1,500 cubic inches
3 liter
100 fluid ounces
2 lbs. 11 oz. / 2 lbs. 14 oz.
1.22 / 1.30 kilograms
<19 / 19+ inches
<33 / 33+ inches
Metal alloy peripheral hoop/EVA backpanel
6 + main compartment
19 x 10 x 10 inches
Frame type
Gear capacity (L)
Gear capacity (cu. in.)
Liquid capacity (L)
Liquid capacity (fl. oz.)
Weight - metric
Adjustable torso
Fits torso
Fits waist/hips
Frame material
Pack loading
Number of exterior pockets
Bite valve shut-off switch
Quick disconnect tubing
Wide-mouth opening

Osprey Manta 25 Hydration Pack - 100 fl. oz.

Loading Ratings & Reviews...

Osprey Manta 25 Hydration Pack - 100 fl. rated4.6out of5by5.
Rated5out of5byfromVery comfortable and functionalGreat for extended day hikes. Dual belt pulls make it easy to re-adjust on the go.
Date published: 2013-07-23
Rated5out of5byfromQuality day pack worth the moneyI use this pack for day hikes bc its small enough where its comfortable to carry but has just enough room to carry what u need for a day. I also use it for biking on occasion. I love all the pockets and how they are distributed, very well thought out design. You have a cover included on the bottom of the pack in case of rain. It has a place to attach your helmet. My favorite thing about this pack is the design of the bladder. The bladder comes with a handle which makes it easy insert into the bag when full. It also comes with a magnet to attach the bite nozzle, rather then let it hang, very cool.
Date published: 2013-03-27
Rated4out of5byfromNice Sack!Great pack for day hiking or trail biking, light, plenty of storage, well designed.
Date published: 2013-02-20
Rated4out of5byfromLove itGreat pack, very well thought out. The only mistake I made was overfilling the hydration reservoir which resulted in a leak. The next time I didn't fill it up passed the hole and it was fine.
Date published: 2012-09-26
Rated5out of5byfromWorth the investment!I have used this pack for a year now on day hikes from 7 - 17 miles, and I love it. The biggest PROS for me are the air flow mesh, stability, adjustability, and the pockets on the waistband. Whether it's fully packed or not the pack conforms well to my body, secures the contents and makes it easy to maneuver without having water or any of the contents sloshing around. I can see how others will say it doesn't actually fit 25L. The pack has 1 large compartment, 2 medium(ish) ones on the sides, another small one on top, an open front pouch and 2 small waist pockets (not to mention 2 side pouches for bottles, or shoes, or other). If your gear is large, bulky or awkwardly shaped you'll probably have difficulty fitting it all in. But I like having several compartments! It makes it easy to find everything. It's also easy to attach items to the outside (light jacket). I haven't had any issues with space. In any case, I would recommend getting your hands on the pack first before you buy it. The bite valve took me a bit to get used to, but not a big deal at all. The locking feature is great, I haven't had any issues with leaking. Happy shopping! :)
Date published: 2012-09-04

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