Black Diamond Infinity 50

Priced: $134.95 - $199.95 Rated:   - 4 stars out of 5 by 7 reviews.
Black Diamond Infinity 50
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Black Diamond Infinity 50 -

The Black Diamond Infinity 50 Pack is an award-winning hiking backpack that blends the generous volume of traditional Black Diamond packs with innovative design and technology. This Black Diamond backpack features top loading access with a floating top pocket, shoulder straps and removable hipbelt with soft and breathable 3D mesh, hydration compatibility and is an ideal Black Diamond pack for your next weekend mountaineering endeavor. So use the Infinity 50 backpack to pack up your Black Diamond tent and Black Diamond climbing gear and hit the backcountry. And don’t forget your Black Diamond ice axe for enjoying an evening scotch on the rocks.

FEATURES of the Black Diamond Men's Infinity 50 Pack.
SPECIFICATIONS of the Black Diamond Men's Infinity 50 Pack.


  • Soft, breathable 3D mesh on shoulder straps and removable, interchangeable hipbelt


  • Aluminum V-Motion frame is customizable to match the contour of your back


  • 50 L, 3,050 cu in (size M)
  • SwingArm shoulder straps thread through the base of the pack and connect together by a cable that continuously balances strap length as you hike
  • 1.74 kg, 3 lb 13 oz (size L)


  • Front compression pocket serves both as storage and as added compression when pack volume is low
  • hip belt stash pocket, side stretch pockets and front compression stretch pocket
  • Top-loading with floating top pocket

Lining and Layers:

  • Interchangeable ergoACTIV hip-belt is mesh-lined for comfort and attaches to pack by a ball joint to tilt, lean, and rotate with your torso


  • 210d nylon ripstop, 420d nylon twill


  • Retractable trekking pole/ice axe loops, removable sleeping pad straps


  • OpenAir mesh back panel allows cool air to flow in between your back and the pack and vents away hot, sweaty vapors


  • ergoACTIV suspension with OpenAir backpanel


  • Also available as women's-specific Innova
Black Diamond Infinity 50 Pack Features.

Black Diamond Infinity 50 Pack.
Carry all the stuff that you need and you won t even feel heavy about it with the Black Diamond Infinity 50 Pack. Formed from 210d Nylon Ripstop and 420d Nylon Twill material, it s incredibly resistant from tearing and ripping. The pack s ergoACTIV suspension system allows it to be stashed with many items for a multi-day trekking. With its OpenAir backpanel, air can nicely flow in your back to keep you moisture-free. You can easily unpack your items without slipping them due to its top loading and floating top pocket features. Its 3D mesh shoulder straps are soft on your shoulders and allow them to freely move. Interchangeable and replaceable hipbelt included on this pack lets your torso move without any restraint. The hipbelt can also be safely tucked in the pack s hipbelt stash pocket along with other items in the side stretch pockets. The Infinity 50 Pack s front stretch pocket provides more storage and compression. When in need to get your tools and your sleeping bag, there s no need to unpack the whole thing, thanks to its retractable trekking pole/ice axe loops and removable sleeping pad straps. Hydration system compatible, you can easily satisfy your thirsting needs. All that you need in a one package, this Infinity 50 Pack from Black Diamond will provide anything that you need without any burden.
This product can only be shipped to U.S. addresses.

Key Features.

Al's Sports
Bring everything you’re sure you’ll need, just don’t feel it with the Black Diamond Infinity 50 backpack. Designed with our ergoACTIV suspension, the Infinity is all about comfort and mobility in a big package, blending the volume of a traditional lightweight backpack with the latest in superior design and technology.
Black Diamond Infinity 50 Pack Features: Patent-pending ergoACTIV suspension with OpenAir backpanelTop loading with floating top pocketSoft, breathable 3D mesh on shoulder straps and removable, interchangeable hipbeltHipbelt stash pocket, side stretch pockets and front compression stretch pocketRetractable trekking pole/ice axe loops, removable sleeping pad strapsHydration compatibleAlso available as women's-specific Innova 50Style number BD681076
Black Diamond’s ergoACTIV suspension means you can comfortably carry the kitchen sink and maybe your dishwasher on your next multi-day trek with the lightweight Infinity 50 Backpack. Household fixtures or not, this top-loading pack maintains versatility and comfort through self-adjusting straps, a dynamic hip-belt, and contoured frame stays. Streamlined design means this pack’s exterior is uncluttered yet you won’t have to sacrifice storage space or useful features.


A midsize trekking pack that really moves with you, the Infinity 50 is the right pack for the job when you're trying to pack as much vertical footage into your long weekend as you can. Black Diamond's ergoACTIV suspension system features a pivoting hipbelt that allows you to really pick your knees up and get your foot on that next step up, without moving the load of the pack off-balance. The SwingArm shoulder straps are connected together by a steel cable that allows them to extend as you reach your arm up to grab a handhold, again without unbalancing the load. The pack body itself is very sleek and uncluttered. 

Blending the volume of a traditional lightweight backpack with latest in superior design and technology, the Black Diamond® Infinity 50 is all about comfort and mobility in a big package.
Soft, breathable 3-D mesh on hipbelt and shoulder straps.
Retractable trekking pole/ ice axe loops.
Removable sleeping pad straps.
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Average Price History: Price History
Review RatingNumber of Reviews
Average Stock Weight:3 lbs 13 oz / 1.74 kg
Award-winning:Winner of Outside© Magazine Gear of the Year Award 2010.
Depth:8 1⁄2 in
Dimensions:25" H x 11.5" W x 8.5" D.
Materials:210D nylon ripstop, 400D nylon twill.
Volume:3,234 cubic inches / 53 liter
•LG:3 lb 13 oz.
•MD:3 lb 12 oz.
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Subcategories of Backpacks, Daypacks & Bags:

Black Diamond Infinity 50 Reviews:

Positive Reviews:

This is a great pack. The suspension systems is one of the best I have ever used, the pivot at the bottom really gives more freedom then any other similarly sized pack that I have ever used... you don't realize it until you put something else on and feel how stiff most hip belts make you feel. I have comfortably used the pack for everything from hauling my books around campus to weeklong backpacking trips. It cinches down nicely with smaller loads, but when packing for a week and carrying around 45 lbs I still had extra room had I needed.
Small annoyances are that:
it is basically one huge space, with just the brain on top for organizing smaller stuff, so you will probably want to invest in some stuff sacks to organize your stuff.
the ventilation system isn't the best in the world. It's not a trampoline style, but it's pretty good for mesh and foam core. (The day a company comes up with a trampoline style pack along with a pivoting hip belt will be a grand day indeed)
No bottoms access... I guess with a pack this size it is somewhat to be expected, but a zipper along the bottom so you can pull out your sleeping bag without emptying the pack would be nice.
Basically this is an extremely versatile pack that can comfortably handle just about anything, and doesn't restrict you like most packs.

Terran Siladi at on 03/11/2012

Fits enough gear for an overnight or two, and performs comfortably with 40 lbs when scrambling (as long as you stack the weight near the hipbelt, but thats probably true of all packs) and fits in an overhead compartment when stuffed nearly to capacity. I haven't used it enough yet to make a durability claim but I haven't seen any weak points yet. One thing it lacks is a great deal of pockets, there's compression pockets on each side and the front, and only one hip pocket, but that's a small knock for the quality at the price.

Sal Paradise at on 09/14/2010

I bought this pack for long weekend trips, since that is just about all I get to do these days, and I love it. The ergoACTIV belt makes the pack feel like it's a part of your body. I've loaded this pack up with 35-40 lbs of gear and dog food and I can barely tell it's there. In terms of durability it's been on two long weekends hiking, a week in the BWCA, and checked twice in the last couple months and it seems to be holding up fine.
No complaints at all. Absolutely a great backpack.

Tyler Johnson at on 07/07/2010

The combination of the ergoACTIV suspension and SwingArm shoulder straps make this pack perfect for climbing approaches. Navigating rough trails and scrambling is so much easier than a non-suspension pack, even carrying a rope, gear, and other stuff. The suspension really allows the pack to move with you, rather than the pack moving against you. Highly recommended!

acheong1355746 at on 04/06/2010

This pack is so great. The way it moves on your hips\shoulders is so comfortable and offers great climbing\scrambling mobility.The hip belt is super comfortable and easy to pull very tight. I've taken it on as airline carry on when it was cinched down very tight too.

Girard Ordway at on 07/07/2010

Negative Reviews:

Personally I did not like this bag at all. I have to admit that the hip belt and cables running through the pack did do a good job of displacing weight, but there are two major design flaws.
1) If the backpack is not filled all the way with whatever, the top cover keeps falling off. For example, I put my camera and glasses and things i need quickly in the top pocket, and instead of resting on the clothes that should fill the pack, it just falls off to the side or on my head. Very annoying.
2) The grey areas of the pack are like an elastic material allowing you to put rain jackets or something you might need quick in it, but after a few weeks the elasticity wears off and things keep falling off.
Alsoooo, the shoulder straps are just a bit too narrow for my liking, and do not allow enough pressure to be distributed along your shoulder blades.

Ben Zonon at on 11/03/2010

I love the design of this pack, but the suspension really doesn't work well for me. At first, I thought it felt cool and great. But upon using it on my ski mountaineering adventures, I realized this pack was terrible, at least for that application. Once it is loaded, it sways too much due to the pivoting suspension. It DOES NOT MOVE WITH YOU, instead it pulls you around in directions you don't want to go. If you want a pack that moves with you, choose one with a static suspension. I found the pack of my dreams in the Gregory FUSION LTS line up (Gregory and BD are now the same company by the way). I especially love the Torre and Serrac packs. They make heavy loads feel like a feather and most importantly, the packs move with me rather than knocking me off balance.

DP at on 07/31/2010