Adrenaline 20L Day Pack is built to move fast with all-day comfort and water resistance
What Our Gearhead® Experts Are Saying:
"This pack surprised me—lightweight but burly. I’ve used it for everything from trail runs to alpine scrambles. The daisy chains and padded top pocket make organizing gear easy, and it handles wet weather better than most packs its size."
When speed and simplicity matter, we load up the Outdoor Research Adrenaline 20L Day Pack. With just enough space for layers, fuel, and essentials, it’s our go-to for quick alpine pushes, fast-moving trail hikes, and grab-and-go days outside. Built with a durable mini ripstop nylon shell and coated to shed light moisture, this pack keeps our gear dry when we get caught in passing squalls.
From the breathable shoulder straps and ergonomic back panel to the intuitive pockets and hydration sleeve, the Adrenaline 20L feels dialed for high-output missions. Dual daisy chains expand our gear haul options—perfect for clipping a helmet or stuffing in a rain shell—and the padded top zip stashes our must-haves within reach. Whether it’s a summit sprint or a trail loop before lunch, this pack is ready to keep pace.
Details
- Streamlined 20L daypack built for alpine pushes and quick hikes
- PU-coated ripstop nylon shell repels light moisture and abrasion
- Padded top pocket keeps valuables protected and accessible
- Ergonomic shoulder straps and back panel for breathable comfort
- Dual daisy chains add external gear-carrying capacity
- Two external water bottle pockets for quick hydration
- Internal hydration sleeve and adjustable sternum strap
- Detachable waist belt for customizable support
- Item #ODRZ8TS
This item is made with PFAS chemicals and cannot be shipped to some states. View Shipping Policy
- Material
- [face fabric] Mini Diamond Ripstop (210D nylon, PU coating), [lining] 55% oxford polyester, 45% recycled polyester
- Volume
- 20L (1220cu in)
- Shoulder Straps
- padded, adjustable
- Waist Belt
- adjustable
- Access
- top
- Pockets
- 2 side water bottle, 1 zippered top, 1 internal hydration sleeve
- Dimensions
- 18 x 9 x 10in
- Claimed Weight
- 1lb 6.2oz
- Manufacturer Warranty
- limited lifetime
- Activity
- casual, hike & camp
Reviews
Q&A
What do you think about this product?
Overall Rating
4.5 based on 11 ratings
Review Summary
Customer Images
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Selecting an option will reload the available reviews on the pageDecember 5, 2024
Very good, simple bag
This is a very good, very simple bag. It has a small outside pocket on the top and main compartment. I have used it for a few hikes and a few 20+ mile runs with a bladder inside (it does have a loop to keep the bladder upright). Good bag for the money.
Originally reviewed on ExpertVoice.com
September 5, 2024
Great day pack for experienced hikers
It's a great pack for a day trip. Though some of my hikes are long days, this can carry the essentials I need but is light and versatile. Two water bottle pouches on the outside are great. Can be combined with a Fanny pack or other items.
Originally reviewed on ExpertVoice.com
August 31, 2024
Good day pack
I've used this for mountain runs and sport climbing. It took me a while to discover the hose pass-through for the hydration bladder. The pack is mostly one giant space which has plusses and minuses. I wish it had another zippered pouch on the outside for snacks. I've kept them in the outer stretch pockets which works well enough I guess.
Originally reviewed on ExpertVoice.com
June 10, 2024
good quick trip minimalist pack
Good smaller pack for quick fast and light trips with minimal gear, wish the hip belt had just a little bit of padding , i probably should have bought the plus version as i'm 6'3'' and 208 lbs athletic build and the regular pack is tight on me even with the straps at max.
Originally reviewed on outdoorresearch.com
June 1, 2024
lightweight daypack perfect for climbing
I use it as a climbing gym bag. Just enough space for a harness and chalk pot in the main compartment. Small items like keys wallet and vape in the top compartment. The dual tumbler holders on the sides are expandable and can hold a camelbak 32oz chute mag bottle with ease. The material is thin and light yet feels durable enough to be thrashed around. It can flatten just enough to be squeezed into a folded-up crash pad with no problems. Only knock is the waist strap could use some padding otherwise it's an awesome just-right sized pack
Originally reviewed on outdoorresearch.com
May 12, 2024
Good pack
Good light weight pack, another review said there's no passage for the water bladder hose but it actually comes out on the shoulder straps, wish the hip straps had just a little bit of padding, also it's seems a little tight fitting for someone 6'3 208 lbs
Originally reviewed on outdoorresearch.com
April 11, 2024
Really really solid but why no passage for a bladder hose?
This is a very solid backpack but a little disappointed it doesn't have a passage for the bladder hose to extend out of the pack. I'll accept it's my fault for not making sure it did before ordering but honestly didn't consider the pack would have a bladder hook/sleeve but no passage way for the hose.
Originally reviewed on outdoorresearch.com
March 31, 2024
Well built and lightweight day pack
Love the color. Sturdy pack that is perfect for a day hike.
Originally reviewed on ExpertVoice.com
March 11, 2024
Excellent Waterproof Day Pack!
Solid and well built pack that is very waterproof, which is the main thing I wanted from it. Quality zippers and overall construction that feels like it will last. Only gripe is with the interior pocket, which is a little tight, and feels a bit less functional than the rest of the pack. It will be used as my daily pack for bringing my things to work in the PNW, and I expect to get many years out of it!
Originally reviewed on ExpertVoice.com
March 6, 2024
functional day pack
Nothing groundbreaking but nice construction, incredibly light, and has some nice features. It has a rigid backplate to keep things from poking your back and to provide stability. Waist and chest straps which are nice. It also has two bottle pouches on the side. Works good as a simple day back I just wish it had more pocket options internally and externally
Originally reviewed on ExpertVoice.com
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