Why We Like The Lithium 15L Daypack
Whether we're trail running, climbing, or just out for a brisk stroll in the mountains, the Mammut Lithium 15L Backpack helps us shift into a higher gear with a speedier, lighter weight design. The well-ventilated back panel keeps us cool and comfortable while we're trail running, and the integrated, detachable raincover protects our gear in a pinch under passing rainstorms. A zippered main compartment and large front pocket accommodate everything we need for an afternoon at the crag, while side compression straps and a hydration compatible design help us adapt on long, roaming day hikes.
Details
- The smallest, speediest daypack option in Mammut's Lithium line
- Contact Vent backpanel and EVA straps make for a comfy, stable carry
- Zippered main compartment allows you to toss in all your gear
- Hydration system compatible for easy drinking on the go
- Trekking pole carrier frees up your hands for scrambling
- Integrated raincover breaks out in seconds for dry protection
- Lateral compression straps enable you to cinch down the load
- Multiple zippered pockets throughout organize smaller essentials
- Item #MAMU5GA
- Responsible Collection
- Recycled/Repurposed
- Material
- [face fabric] 100D recycled nylon robic, [bottom] 210D recycled Dragon nylon
- Volume
- 15L (915cu in)
- Support/Suspension
- Contact
- Shoulder Straps
- EVA
- Waist Belt
- detachable, padded
- Hydration Compatible
- yes
- Reservoir Included
- no
- Access
- top
- Pockets
- 1 fold-out cellphone hip, 1 zip with key, 1 large front zip, 2 mesh side, 1 hipbelt zip
- Trekking Pole Carry
- yes
- Compression
- lateral
- Rain Cover
- integrated, detachable
- Dimensions
- 9 x 7.8 x 20.4in
- Claimed Weight
- 1lb 9.3oz
- Activity
- hiking
- Manufacturer Warranty
- lifetime
Reviews
Q&A
What do you think about this product?
Overall Rating
5 based on 11 ratings
Review Summary
Fits True To Size
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.View
Selecting an option will reload the available reviews on the pageJuly 6, 2025
Good day pack
Good smaller pack for day hikes or weekend trips out of town. I do like the phone pocket for hikes as mentioned previously. I like being able to pull the waist strap out for use when flying or throwing in the car for overnight.

Originally reviewed on ExpertVoice.com
May 14, 2025
Excellent size and features for the price
The backpack has great pockets, a comfortable attachment system, built in raincover, and hip pockets. It is hard to find all of these features in a backpack this size.

Originally reviewed on ExpertVoice.com
May 7, 2025
Good Smaller Pack
- Familiarity:
- I've used it several times
- Size Bought:
- 15L
It is a decent little pack. I purchased this for a 50Mile ruck that I will be doing late summer. It may be a little to small for my needs for that particular journey. It fits a 3L camelback well but when full, there is not a ton of room for other needs (additional shoes and larger clunkier items). Lots of little pockets and storage. Fits comfortably on the back and breathes fairly well. I think this bag is ideal for shorter jaunts and perfect for long cycling rides.
January 19, 2025
Perfect little all-rounder
For years I used my Black Diamond BBEE as a small go along bag, but after 10+ years of abuse it started tearing. The search for other substitutes was attempted, but not seemed to fit the bill until I got the Lithium 15. A little larger than the BBEE, it also does well on work trips where I'm in and out of boats, riding ATVs, and wading small creeks in the same day. A common companion for winter fat bike rides, and long lift assisted winter pow days where I wanted an extra set of gloves, water bottle, and a sandwich for the afternoon. The built in rain fly worked well today in the rain and sleet at alyeska. Has also been a companion in European market shopping, New Mexico and Alaska day hikes, and mucb more.

Originally reviewed on ExpertVoice.com
July 15, 2024
Good product
Very light weight. Fits comfortably. Removable waist strap depending on the adventure. Stylish

Originally reviewed on ExpertVoice.com
December 28, 2023
This bag is lightweight, sturdy and the perfect size. It works great for a climbing day, short hike, and even travel through airports. It looks flashy too. The small pouch on top works great for quick access items and the zippers don't catch. The phone pouch actually did come in handy for a day hike with a full sized iPhone.

Originally reviewed on ExpertVoice.com
November 7, 2023
I originally got this pack for day hikes, snowboarding, and multi-pitch climbs, but I found myself using this pack for my travels as well b/c it's a great size pack and it'll fit my 13" macbook. The pack looks amazing and is well-constructed. One thing I also love is that it came with a rain cover.

Originally reviewed on ExpertVoice.com
November 2, 2023
Nice day pack
I like it for day hikes to throw a jacket, water, and some munchies for me and pupper. It might fit a laptop for air travel?. It rides well and is very light without causing a lot of sweat.

Originally reviewed on ExpertVoice.com
September 7, 2023
Nice little bag for day trip.
Has a few options that make this back great. Small roll out pocket for cell phone, rain cover built in the bottom.

Originally reviewed on ExpertVoice.com
August 16, 2023
Perfect Travel Companion!
The Lithium 15 backpack contains all of the features and functions of a larger hiking bag, but in a convenient size for day trips or air travel. I recently used this on a multi-leg cross-country trip where I needed a compact bag for airlines and for quick hiking around local trails. The small size was perfect for the plane, while the features such as chest and waist straps, hip belt packets, and integrated rain fly (!!!) came in handy. I'd recommend this to anyone who is looking for a small bag to supplement their normal backpacking and/or travel gear. You won't be disappointed with the build quality or features packed into this 15L gem!

Originally reviewed on ExpertVoice.com
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