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Tag Archives | Flex Capacitor 40-60 Pack

For most backpackers, the Flex Capacitor 40-60 Pack will be ideal for 3-season trips between 3 and 7 days in length. It weighs just 2.5 pounds, but it’s fully featured: durable all-nylon construction, six external pockets, two compression straps, removable hydration sleeve, and a suspension system that was tested with loads up to 70 pounds.

Its most unique feature is a front-side gusset that can be collapsed or expanded to uniformly adjust the pack volume between 40 and 60 liters. Normally, two packs would be necessary to cover this range.

The price is right, at just $200. It is currently available directly from Sierra Designs, with wider distribution planned in the spring 2017.

The FC features six exterior pockets: two on the hipbelt, two side pockets, one top lid pocket, and a shoulder strap pocket.

Giveaway: Win a Flex Capacitor Pack & The Ultimate Hiker’s Gear Guide

Sierra Designs is putting on a giveaway that you’ll want to get in on, through this Thursday (Feb 24). Enter to win a Flex Capacitor 40-60 Pack and a signed copy of The Ultimate Hiker’s Gear Guide. Enter here at SierraDesigns.com Update. This contest has closed.  Congrats to the winners: Laura H. of Denver, and […]



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40L volume at capacity, next to a BV500 bear canister (11 liters)

Reader question: Is the Flex Capacitor Pack appropriate for a thru-hike?

From Lisa K.: For two reasons I wanted to share my answer to this reader question. First, I have not yet addressed the appropriateness of the Sierra Designs Flex Capacitor 40-60 Pack for thru-hiking, and I probably should. Second, it gives me an opportunity to discuss the specific needs of thru-hikers in regards to backpack selection. Appropriateness for thru-hiking […]



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pack-backpack-thumbnail

How-to || Pack a backpack: Load distribution, organization, waterproofing, & canisters

When packing my backpack, I have two primary goals: Minimize its effect on my center of gravity, and Keep oft-needed items easily accessible so that I can hike uninterrupted. I’ll start by discussing these goals in-depth. Then, I will address special considerations like bear canisters and backpack styles. Center of gravity When not wearing a […]



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Final side pocket. Clean and functional, but less durable than pack fabric, and no lock-out.

Room for improvement: Self-critique of the Flex Capacitor 40-60 Pack

Recently I highlighted seven standout specs and features of the Sierra Designs Flex Capacitor 40-60 Pack. Today, I’ll do nearly the opposite: identify its imperfections. Since I co-developed the Flex Capacitor with Sierra Designs, naturally I want to see strong sales of it. But I also want prospective buyers to understand its optimal applications and […]



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The easy-gliding #10 zipper offers annoyance-free access to the pack's main compartment.

Sales Pitch: Seven reasons the Flex Capacitor 40-60 Pack stands out

Earlier today I filmed the product video for the new Sierra Designs Flex Capacitor 40-60 Pack, which with the High Route Tent 1FL currently constitutes SD’s “Skurka Series.” To develop my script, I had to prioritize and succinctly describe the pack’s must-mention specs and features. Later I’ll write a self-critique, as I did for the High Route, but for […]



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Shrunk to 40 liters, using the adjustable gusset

Reviews & commentary: Sierra Designs Flex Capacitor 40-60 Pack

As third-party reviews and commentary about the Sierra Designs Flex Capacitor 40-60 Pack gets posted, I’ll be compiling them here. User reviews at SierraDesigns.com For reviews from “regular” users, go here. Gear Junkie 2016 Gear of the Year We tested it, and not only does the pack expand and contract to maximize uses, but it […]



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