Mammut  Trion 38 Pack - Men's

$209.95
Members get an est. $20.99 in rewards

The ideal partner for climbing, ski touring and mountaineering, this 38-liter Mammut pack is light and durable. It's also water-repellent and abrasion-resistant. The pack can hold ice axes and skis.

Color: Black
Size: One Size
Quantity
Shipping restrictions apply.

Members get an estimated $20.99 (10%) back on this item as a part of your annual .

Members get an estimated $20.99 (10%) back on this item as a part of your annual .
To buy,  sign in as an REI Co-op Member or join now.

Features

  • Made of primarily recycled materials
  • Robust, abrasion-resistant outer material
  • Comfortable thanks to the anatomically shaped, soft padded hipbelt and shoulder straps
  • Large mesh pockets on the shoulder strap
  • Elasticized chest strap for optimum comfort and a perfect fit
  • Roll-top closure with zipper
  • Zippered side access to main compartment
  • Designated compartment for avalanche equipment
  • 2 ice axe attachments
  • Reinforced side ski attachment
  • Trekking pole carrier
  • Hydration system–compatible (reservoir not included)
  • Rope attachment on flap
  • Compression straps can be tensioned at side and front
  • Flap with external and internal pockets with key pocket
  • The Trion line was developed with pro alpinists Stephan Siegrist and Nico Hojac to optimize every last detail

Imported.

View all Mammut Climbing Packs

Technical Specs

Best Use

Mountaineering

Climbing

Bag Style

Backpack

Frame Type

Internal Frame

Gear Capacity (L)

38 liters

Gear Capacity (cu. in.)

2,318.9 cubic inches

Weight

2 lbs. 10.33 oz.

Fits Torso Length (in.)

18.1 inches

Fits Waist/Hips

Unavailable

Material(s)

Polyamide/polyester

Frame Material

Contact EVA foam

Pack Access

Top

Number of Exterior Pockets

3 + main compartment

Hipbelt

Yes

Reservoir Compatible

Yes

Dimensions

23.6 x 11.8 x 10.6 inches

Gender

Men's

Sustainability

Contains recycled materials

Product meets the bluesign® criteria

Reviews

12 reviews with an average rating of 4.8 out of 5 stars

0% 0 of 0 reviewers recommended

Write a Review

Adding a review will require a valid email for verification

Customer Images

Robert B
Rated 5.0 out of 5 stars
5 months ago

Best Climbing Pack I’ve Tried

I love this pack. The chest pockets feel like I’m wearing a running vest on long approaches. It’s only a 38 liter pack but I feel like I can fit 2x the gear as my old mystery ranch due to the thought out gear and tool attachment points. Currently have gear for 3 people with 3 ropes and 3 sets of ice tools attached and bet I could fit even more if needed. Gonna be hard to ever “upgrade”

Alex E
Rated 4.0 out of 5 stars
10 months ago

Trion 38 - Solid pack for lighter loads

I used this pack for an overnight to try it out before getting into the snow. I am 5'11''. The torso is a little short and there is not a lot of structure to the belt, so it did not carry weight well. It did great from a water protection standpoint, keeping my gear dry in a downpour. Overall solid pack, durable attachment points. My brother was using a hyperlite pack and was envious of the durability features. I would only use it for lighter weight day-trips and mountain summit attempts. Overall, very solid pack for quick adventures. I am excited to try it out in my next summit attempt.

Ephraim M.
Rated 4.0 out of 5 stars
5 months ago

Toller Rucksack, leicht, super TragegefĂĽhl,

[This review was collected as part of a promotion.] Toller Rucksack, leicht, super Tragegefühl, mit den speziell geformten Trägern sitzt der Rucksack sehr gut am Körper, das Gewicht hängt nicht nur an den Schultern, sondern wird auf etwas auf die Brust verteilt. Vor allem bei Drehungen ist das von großem Vorteil. Leider war die eine Materialschlaufenleiste nicht gut vernäht und ist ausgerissen. Mammut hat den Rucksack aber zurück genommen und der Ersatz ist in Ordnung.

Patrick J
Rated 5.0 out of 5 stars
1 year ago

Great for multi-day hut-to-hut trek

I needed this size pack for the W trek in Torres Del Paine National Park in Chile. The pack is light weight, comfortable and sleek. No water bottle pockets, but I used it with at 2-liter hydration bladder which worked great. Could have fit a 3 -liter bladder if needed. It's more than a day pack but less than a full size back country back pack. Zippers and Buckles are durable and easy to use. Good access to stuff inside, without a lot of unnecessary pockets and accessories. I'm very pleased with it.

Gavin D
Rated 5.0 out of 5 stars
4 months ago

Great bag, Its perfect for rock or ice climbing. Ive used it for both and have never felt i needed more space or that the bag was too big. Its perfect for a long pack out, and if need be you could somewhat comfortably carry two 60m ropes if you stack the bag well.

thomas s
Rated 5.0 out of 5 stars
1 year ago

Trion 38

I love this pack for BC skiing and mountain adventures. I rarely use the full 38L, but the pack rolls down (like a drybag) for whatever size you need. I love the side zip for easy access inside.

Chuck K
Rated 5.0 out of 5 stars
1 year ago

Solid backpack with plenty of space and features for all your climbing gear.

scott b
Rated 5.0 out of 5 stars
1 year ago

Great size for ice climbing with all the attachments and built very well!

Paul S.
Rated 5.0 out of 5 stars
2 months ago

[This review was collected as part of a promotion.]

Anton W.
Rated 5.0 out of 5 stars
2 months ago

[This review was collected as part of a promotion.]

1 - 10 of 12 Reviews

Questions & Answers

Loading Questions...
10% co-op member reward: $20 $20 Member Reward
Your NameLIFETIME MEMBER#0123456

This purchase pays for membership!

Buy a lifetime $30 membership and make a $50 purchase by Sep 07, 2026.*

$20

10% Reward*

on this and every eligible full-price item*

+

$30

Bonus Card*

valid for 30 days after joining*

=

$50

Value