• Online:
  • URL for this product:
  • From the U.S. and CanadaCall 1-800-426-4840
  • Mon. through Sun., 4 a.m. through 11 p.m. PT.
  • InternationalCall 1-253-891-2500
  • Mon. through Sun., 4 a.m. through 11 p.m. PT. English language only.
Osprey Manta 36 Hydration Pack - 100 fl. oz.


    Osprey Manta 36 Hydration Pack - 100 fl. oz.

    The updated Osprey Manta 36 hydration pack combines ample volume and great carrying comfort with the latest in easy, functional hydration. See details

    • $159.95

    Item # 846429

    REI Members get back an estimated $ 16.00 on this item as part of their annual member refund.

    The REI Member Dividend

    The REI dividend is a unique benefit of membership in the REI co-op. It's comprised of your member refund—typically 10% back on eligible purchases—and/or your REI Visa® card rebates.

    Each March, active REI members and REI Visa cardholders who earned a rebate receive a refund in the form of an annual dividend notice.

    Only active members receive annual dividend notices. To maintain your active status as an REI member, you need to make net merchandise or shipping purchases of at least $10 per year, unless you joined that year. Member numbers are issued in one name and only that person receives the member refund. Your number can be used by others in your family, but it cannot be transferred to someone else.

    Questions? Call us at 1-800-426-4840 for more about your dividend or its redemption.

    Learn more

    The updated Osprey Manta 36 hydration pack combines ample volume and great carrying comfort with the latest in easy, functional hydration.

    Product size and color
    * Color/Size is out of stock but can be backordered.

    The updated Osprey Manta 36 hydration pack combines ample volume and great carrying comfort with the latest in easy, functional hydration.

    • 100% Satisfaction Guaranteed
    • Gear and Advice You Can Trust

    This item ships for free! Learn more

    To view videos or use the zoom feature on REI's websites, please download the latest version of Adobe Flash Player.


    The updated Osprey Manta 36 hydration pack combines ample volume and great carrying comfort with the latest in easy, functional hydration.

    • Reservoir features a rigid spine/handle that stabilizes the water load and makes it easy to slide the reservoir into the pack
    • Zippered hydration sleeve is easy to access
    • 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
    • Biostretch™ harness is ventilated for cooling comfort; full hipbelt adds stability and load transfer
    • Panel-loading main compartment is spacious enough for a long day's worth of food, clothing and gear
    • Zippered top 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 shove-it pocket offers quick external storage and access; integrated patch holds a blinker light (sold separately)
    • Zippered side pockets, front pocket and hipbelt pockets carry small items within easy reach
    • Stow-on-the-Go™ system lets you attach or remove trekking poles without taking the pack off
    • The Osprey Manta 36 hydration pack features an integrated raincover that can be deployed quickly to keep contents dry


    Item 846429

    Members: earn a
    $20 bonus card

    When you spend $100 April 14—29

    Single-use bonus card redeemable by
    REI members MAY 2—12, 2014.

    Not a member? Join Now!
    Add to Cart

    REI Membership

    View specs for sizes: M/L, S/M

    Osprey Manta 36 Hydration Pack - 100 fl. oz. Specs
    Best use
    36 liter34 liter
    2,197 cubic inches2,075 cubic inches
    3 liter3 liter
    100 fluid ounces100 fluid ounces
    2 lbs. 6 oz.2 lbs. 4 oz.
    1.08 kilograms1.02 kilograms
    18 - 21 inches16 - 19 inches
    28 - 50 inches25 - 45 inches
    Metal alloy peripheral hoop/EVA backpanelMetal alloy peripheral hoop/EVA backpanel
    9 + main compartment9 + main compartment
    19 x 13 x 11 inches19 x 13 x 11 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 36 Hydration Pack - 100 fl. oz.

    Loading Ratings & Reviews...

    Osprey Manta 36 Hydration Pack - 100 fl. rated4.3333out of5by27.
    Rated5out of5byfromSweet packOddly enough, I don't like hydration packs, I prefer water bottles. But I got the Manta because of its multiple pockets. I need it to carry a 12 inch tablet, an extra layer, some food, sunblock, phone, water for the day, hat, sunglasses and a bunch of knick knacks I always need to have on hand. I actually pulled out the hydration bladder because leaving it in made the pack pull me backwards, but taken out, the fit and feel are just perfect. The belt is really comfy, too. I can wear it all day without any sore spots, it holds what I need without making me feel like a pack animal, it's just a very sweet pack.
    Date published: 2014-04-17
    Rated5out of5byfromGreat packI have been looking for a good day hike pack that can hold all my gear. I did my research online and then went to my local REI and was there for about 2 hours trying on different packs. This pack is amazing, I love how it has a bunch of different pockets to hold all my gear. I did a 6 mile hike the next day with it and it felt great. My back stayed dry through out the hike. I have already told a few friends who we're looking into getting a new day pack and they are all considering this pack. If your looking for a light pack that can hold all your gear this is the one to get.
    Date published: 2014-01-03
    Rated5out of5byfromGreat packEverything about this pack is great, and as described. It would be nice to have a clasp to clip my gps to (like my Deuter), but this one is better for climbing, scrambling and mountain biking.
    Date published: 2013-10-09
    Rated5out of5byfromWell made!!!I have been using day packs for decades, from skiing, mountain biking to long hikes in the Sierras. and have owned at least 20 or more bags. This is by far the best to date! It is well made, very organized and the water system is even better then the best Camelback has to offer. It has held up well to gerneral use.
    Date published: 2013-10-05
    Rated3out of5byfromIt's okayI bought this pack for a three day backpacking trip to Havasupai. I took it and a small Ribz front pack because I didn't want to fool around with a larger backpack. The magnet on the drinking tube was annoying because I don't fasten the chest strap and it would stick to other ferrous pieces of my gear. The chest straps are overly elaborate and difficult to adjust. It would also be good for the pack to have more and sturdier loops to attach gear to the top and bottom.
    Date published: 2013-10-05
    Rated5out of5byfromJust what I was looking for!I do alot of hiking, some long, some short, but I always like to have all my gear with me because when I'm geocaching you never know what situations your going to run into. This pack has it all, plenty of water capacity, plenty of gear capacity, and lots of little pockets to organize things. And most of all, it fits my body correctly so most of the weight is on my hips and not my shoulders.
    Date published: 2013-10-04
    Rated5out of5byfromGreat PackThis pack is great, comfortable and holds more than enough for long day hikes. It also breaths good in the back with the airspeed and in the shoulder/waist straps
    Date published: 2013-10-03
    Rated4out of5byfromGreat ProductI use this for 3+ hour hikes through hills in the Texas Hill Country. The water reservoir works wonderfully and has allowed me to take trips in the middle of the summer with no issues. The magnet also became one of my favorite items. After biking and hiking with other reservoirs, having the mouthpiece stay still is amazing. The different pockets make it convenient for storing a multitude of different items such as snacks, extra clothing, sunscreen, etc. The only issue I really have is the shoulder padding is rather thin. This has not caused any big issues but I do believe some more padding would make my longer hikes more comfortable. As a reference, I usually carry around 15-20 pounds in the pack. I have also used this as a bag when going on short trips and the amount of pockets makes it a new essential in my travels. Overall, for the few months that I have had the product, I am very satisfied and can't wait to get many years of use.
    Date published: 2013-10-03

    Ask a question and have it answered by REI product experts and fellow outdoor enthusiasts. Need immediate assistance? Use Live Help.

    Loading Questions & Answers...

    How are we doing? Give us feedback on this page.

    FREE SHIPPING With $50 minimum purchase

    MEMBERS, EARN A $20 BONUS CARD! When you spend $100 April 14-29. Single-use bonus card redeemable May 2-12. Details
    • Join REI today!
    • REI Membership
    • REI member benefits include an annual refund (typically 10% on eligible purchases).
    • Join REI today!
    • Sign up for REI Gearmail®
    • and get 15% off selected items!
    • Store Locator
    • Locate an REI store near you.
    • Find a Store
    © 2014 Recreational Equipment, Inc. All rights reserved. REI, the REI Tree and Mountain design, Novara, and
    REI Adventures are trademarks of Recreational Equipment, Inc.

    Find REI on: FacebookTwitterYouTubeFlickrMobile site