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Mountainsmith Mayhem Reviews and Buyer's Guide (Jan 2019)

4.21 based on 43 reviews
Mountainsmith Mayhem
95% of the Mountainsmith Mayhem reviews are good or excellent!

Excellent (43%)
Good (52%)
Average (4%)
Poor (0%)
Bad (0%)

Specs across all Mayhem models
Capacity iconCapacity35-45 l (2136-2746 cuin)
Weight iconWeight2.9-3.5 oz (1.3-1.6 kg)
Length iconLength25-27 in (64-69 cm)
Width8-9 in (20-23 cm)
Height11-12 in (28-30 cm)

Reviews Summary

Here's what the reviewers think about the Mountainsmith Mayhem:

Reviewers like these things about the Mountainsmith Mayhem

  • Reviewers thought that the Mountainsmith Mayhem backpack provides optimal durability due to its 305D Multi-Rip HP Cordura fabric.
  • Other reviewers said that they were able to fit essential things including passport and smartphones on its side panel zippered stash pocket.
  • Those who have used the backpack recommended the use of the bag for traveling and hiking.
  • Many of the users mentioned that its stretchable pockets made it easy to grab items placed there.
  • Other users found the backpack comfortable to wear.
  • Testers lauded the bag for having enough room to put personal belongings and equipment into it.
  • Other testers also commented on the presence of daisy chain attachment loops, making it easier to place essential gears for hiking.
  • Many reviewers found the stability and load dispersion of the backpack great.

Reviewers don't like these things

  • A user said that the water bottle from its designated pocket might fall out if he bends over.
  • A laptop user noted that there was no designated place where can place his gadget.

Popular Models

Mountainsmith Mayhem 35

100% choose the Mountainsmith Mayhem 35

Colors and combinations:


Capacity iconCapacity35 l (2136 cuin)
Weight iconWeight2.9 oz (1.3 kg)
Length iconLength25 in (64 cm)
Width8 in (20 cm)
Height11 in (28 cm)

Feature Summary

Many sources mention these Mountainsmith Mayhem features:
  • Hydration compatible
  • Hydration bladder
  • Carry-on size

Some sources also mention these features:
  • Compression straps
  • Hip belt
  • Sternum strap

Actual features depends on the model, so check the features before you buy.

Packing Guide

See how much a traveller, an athlete and an outdoorsy person can pack in the different Mountainsmith Mayhem models (the most popular choice is the Mayhem 35).

Capacity/Weight Levels

The capacity/weight level shows how much the bag weights compared with it's capacity (volume).

The lower the capacity/weight level, the better.

3535 l2.9 oz0.08 oz/L
4545 l3.5 oz0.08 oz/L

Mountainsmith Mayhem
Average for 17,986+ different bags


vs Mountainsmith Bags

The Mountainsmith Mayhem ranks #6 compared with the other Mountainsmith bags.

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vs All Bags

The Mountainsmith Mayhem ranks #430 compared with all the bags we have checked.

Top 30% bag

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429Mountainsmith Mayhem
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432Osprey Pogo
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Selected Reviews

Climbing Zine

This pack will stay in the “hopper”. I’ll be using it when the rack is light, and convenience is key. The “feel” of it is great, the back padding is comfortable, and the wireframe disperses the loads properly. Bring the Mayhem 45 for the casual cragging and travel, but leave it home when you’re bringing everything but the kitchen sink to the wall.

Posted 30 March 2018 by Luke Mehall - Read full review

Dirtbag Dreams

The Mayhem may well have taken its place as my favorite pack for single pitch days when a full rack of gear needs to be carried out to the farther routes in Eldorado Canyon, as well for backpacking, snow-shoeing, and camping in the backcountry.

Posted 20 July 2016 by Sean Smith - Read full review

Backcountry Skiing Canada

The Mountainsmith Mayhem 35+ is an impressive backpack that can multitask at just about anything. Its comfortable fit, range of features and light weight are all strong selling points, not to mention its surprisingly low cost of $139.

Posted 4 October 2011 by Ryan - Read full review

Bag ID 31316. Images from Amazon Product Advertising API

Last updated on January 11, 2019