Endurance Pack 4L - V2.0 (2L bladder, 4L cargo): Ideal for running and biking

Rated 4.9 out of 5
59 Reviews
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  • Regular price $185.88


A highly breathable and durable mesh yields maximum heat release in a tough package. The pack is stretchy, but has a balance of maintaining form while allowing plenty of movement. This pack is excellent for carrying your fluids while running and riding. The front harness is stretchy so you can breathe during movement.
  • Mountain Bike: Extremely stable on your body across the choppy stuff, and we extended the shoulder area a bit to allow freedom of movement. 4 front pockets allow for quick access of your essentials on the fly.
  • Running: Short runs or as long as you want to go. This hydration pack is loaded with features to take you any distance. 
  • Hiking: The conforming fit and quick access pockets paired with a very breathable frame means hiking bliss.  

Endurance Pack 4L, Version 2.0 Animation from Orange Mud on Vimeo.

Fit: This pack is designed to be friendly with your curves. Just slide the sliders up and down to find the optimal fit and adjust the sides snug. Max chest size is around a 52” chest. If you need bigger let us know and we will add more to them!
Optional Accessories

Pack Details

  • Pack Weight: - 11.4oz
  • Dimensions: 10"W x 13" tall / Volume 6 liters.
  • Bladder: HydraPak 2L (70oz) elite, with quick disconnect and blaster valve. 
  • Compartment 1: Bladder compartment
  • Compartment 2: Main cargo
  • Compartment 3: Zippered elastic pocket with secure key clip.
  • MUDX Technology: Trekking Pole Attachment Option. 
  • Material details: Our stretch fabric is tough, abrasion resistant, & endurance designed. 
  • Shoulder pocket storage: Phone, gel, nutrition, electrolyte and more, both sides.
  • Front chest pocket storage: 20oz/600ml soft flask capable and trash pockets.
  • Front adjustments: 2 elastic straps on sliders for an optimum fit.
  • Made in Vietnam

Trail Runners Dog review below.

Endurance Pack V2.0 Review


average rating 4.9 out of 5
Based on 59 reviews
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100% of reviewers would recommend this product to a friend
59 Reviews
Rated 5 out of 5
Review posted

Nice fit!

I had been using two different Nathan brand packs prior to this purchase but could never get them to fit just right and some of the pockets were placed out of reach. I really like how this pack fits and the pocket placement. The one thing I might change is the very long straps used to adjust the fit. I am still unsure about what to do with the extra length so it doesn’t just flap around.

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Rated 5 out of 5
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Rated 5 out of 5
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Rated 5 out of 5
Review posted

Orange MUD Workout bag and Hydration Pack

last October while attending teh Swim/Run NC, Orange MUD was showing work ouit bags. The quality looked outstanding from a durability standpoint. The bag was thick Canvas with solid zippers. Very hight quality. As it so happened I was in need of a new bag. I ordered it and received it a few days later. 6 months later the bag looks brand new. Very High quality. I am a triathlete and use my workout bag daily. It is the best. Last month it was time for a new hydration pack for my long runs. I again went with Orange MUD, 2 Liter pack because of the anticipated quality. I made the correct choice. Very high quality with many pockets for Styuff

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Rated 5 out of 5
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Rated 5 out of 5
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Rated 5 out of 5
Review posted

Excellent pack for medium to long runs.

I've tried and rejected quite a few hydration/gear packs for my trail and road running and really like the Orange Mud Endurance Pack. The balance of size and capacity work well for me and I can carry the absurd amount of fluid that the ridiculous amount of sweat I produce requires. I tend to use the front pockets for my phone and other items I want to grab quickly and carry my fluids in the reservoir and encounter minimal bounce and slosh. Highly recommended.

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Rated 3 out of 5
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Rated 5 out of 5
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Orange Mud Canada

Glad you dig it James!

Rated 5 out of 5
Review posted

Good product, lousy documentation

Like the product, and have been using it regularly, but not sure if I've been using it correctly. No documentation. Does the bladder just get held in place by the piece of velcro inserted through the slider bar (bar used to close the bladder)? And how is that slider bar supposed to stay attached to the bladder? That little piece of plastic cord (for lack of a better term) that holds the slider to the membrane came loose, and I'm not sure how to anchor it properly.

Also do not like the little shoulder pouches. Too hard to get anything out of there.

Oh - and I wish your orange and black pack was all orange. If there's a choice, I buy by visibility, but would rather have had a choice of ALL orange vs. the lime green.

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Rated 2 out of 5
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Rated 4 out of 5
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Rated 4 out of 5
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Orange Mud Canada

Thanks for the feedback! Our product page and follow up fit email that comes out just a few days after purchase has all the details to answer these questions. But the key to fit is to cinch the sides nice and snug, then adjust the front per your liking. We're confident too that you'll dig the shoulder pockets, but sometimes they take a few uses to get figured out best. I prefer a ziplcock with my electrolytes in one side, chapstick/sunblock/etc in the other. And yes the velcro slides through the bladder slider to securely anchor it in the pack! https://www.orangemud.com/products/endurance-pack-bpvp-70-2-0

Rated 5 out of 5
Review posted

Mid range adventure cycling pack

I specifically went with this pack for more capacity than the gear vest and less cumbersome than the adventure pack. They all have their own places; personally, I prefer the adventure pack for casual bikepacking days and the vest for long runs.

The Endurance Pack, however, fit the criteria for gravel racing. It is light. It fits just right without feeling too small or too large. It doesn't sway when I'm mashing the pedals or spinning up hills. The design keeps my cycling jersey pockets available to me unlike most reservoir bags. The 2L capacity offers me just enough water, along with two bottles in my frame, for about 60 miles of hard racing. This is perfect for most gravel events with checkpoints every 50 miles on average.

Broke this bad boy in at the Curto Dirto 50 miler in Stillwater Oklahoma. Performed flawless and will be my go to water source at the Dirty Kanza 200.

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Rated 2 out of 5
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Rated 5 out of 5
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Rated 5 out of 5
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Orange Mud Canada

Thanks Jaffar!