Gear Review- Montem Diadema 18L Backpack (and contest)

This simple yet well designed backpack easily crosses over from an everyday gym bag to a ultra-light multi-pitch rock climbing pack. I received a media sample to demo this past summer and ended up quite impressed with a pack in this easily affordable price range. Let’s take a close look at this model and see if it would be a good addition to your pack fleet!

Montem Diadema 18L Backpack Review
Hard to believe this pack only weighs 4 ounces! The author at the top of Whitehorse Ledge, White Mountains, New Hampshire

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Montem Diadema 18L Backpack Review
This was the gear stuffed into the Montem Diadema 18L backpack for a trip up a 9 pitch route on Whitehorse Ledge this Fall.

At 18 liter (1,100 cubic inches) this pack is 2 liters larger than the popular Black Diamond Bullet and the same volume of the Petzl Bug (my review). The Diadema is a few inches longer than all three of those models which allows internal packing of many styles of trekking poles like Montem’s own award winning line of ultra-light trekking poles. Where this model really stands out in the field of “bullet” packs is in its weight. The Montem Diadema 18L only weighs 4 ounces! This is 14 ounces less than both the Black Diamond Bullet and the Petzl Bug and 7 ounces less than the Mountain Tools Slipstream that I reviewed here.  This weight combined with being able to compress into the size of a grapefruit makes this a great choice for stuffing into a larger multi-day backpack during expeditions or in luggage for international travel.


Montem Diadema 18L Backpack Review
Lightweight but durable fabrics help this pack cross over from “gym bag” to multi-pitch trad pack!

Montem uses a high denier supple waterproof ripstop nylon in the Diadema’s construction. The material feels very soft in hand which helps the pack compress when storing inside a larger pack. Being made of a waterproof fabric is a nice boon with a pack so moderately priced however the seams are not taped or sealed in anyway so I would not consider the pack to be completely waterproof, but highly water-resistent. After a couple weeks of cragging, trips to the gym, and 20+ pitches of alpine climbing the pack has not incurred any noticeable wear or damage. I would assume that over a few years of hard use packs made with heavier fabrics might outlive the Diadema but some sacrifices could probably be made when choosing a pack that only weighs 4 ounces!


This is where we have a bit of a double edged sword. The contoured mesh shoulder straps are super breathable and distribute the weight well. A height adjustable sternum strap helps keep the load centered and thin waist belt secures the pack to the body for better balance while rock hopping and climbing. The actual “comfort” level of the pack varies with how, and what, is packed inside. There is no foam back panel or padding so if you pack your #2 Black Diamond Camalot right up against your back you are going to feel its edge digging into your pack on the approach. The solution here is to pack wisely. I stuff my extra layer, a light puffy jacket, in first and flatten it out along the back to serve as padding before stuffing my hard wear into the pack. With a little bit of thought you can certainly carry a full pack, first aid kit, puffy, headlamp, etc. and everything should carry well over a long approach. Once you’ve racked up and started climbing you will quickly forget that you are even wearing this pack!


Montem Diadema 18L Backpack Review
Features that are at home at the climbing gym, crag, or big wall!

Rounding out the features of this pack the author appreciated the single external zippered pocket that easily fit my snacks and lunch or my first aid kit, headlamp, and other “essentials”. The internal hydration sleeve can hold bladders from 1.5 – 3 liters in comfort and a hydration port allows the hydration tube to exit easily. The minimalist drawcord closing system obviously saves a lot of weight and bulk over zippered closing systems and the inclusion of a whistle on the sternum buckle always gets a “tip of the hat” from me!


This relatively new entry into the field of steam-lined “bullet” packs has a lot going for it. The most impressive features are its insane lightweight and packability. The inclusion of waterproof fabrics and adjustable carry system make it more than a simple gym/tote bag. With careful packing it is excellent for approaches and feels non-existent when technically climbing with your hard-wear out and on your harness. The style and design also lend it well to less extreme uses like travel and a gym/yoga pack. If it sound like a good addition to your gear room check it out at the link below!

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Long time readers (and my wife) know I need a steady supply of the best foot deodorizer on the planet, Friendly Foot. The folks at Friendly Foot have re-stocked my supply and I’ll be raffling up a bottle of this on most of my gear reviews this Fall. You can earn multiple entries and discover how well this stuff works by clicking the Rafflecopter link below! Good luck!

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Montem Diadema 18L Review
Friendly Foot 6 oz Bottle, the best damn foot/shoe deodorizer ever made!

 a Rafflecopter giveaway

See you in the mountains!

Northeast Alpine Start

This product was provided for purpose of review. Affiliate links help support the content created on this blog at no additional cost to you.

One thought on “Gear Review- Montem Diadema 18L Backpack (and contest)

  1. I like hearing how light weight the bag is. And it was a good tip about packing softer things against your back because of no extra padding. I would have figured this out the hard way and had to repack.


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