Flex Capacitor Backpack

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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.

Teaser: Sierra Designs Flex Capacitor 40-60 Pack

By Andrew Skurka / August 3, 2016 /

In news coverage this week from the Outdoor Retailer tradeshow, you may hear about two Sierra Designs products with which I’ve been deeply involved: the High Route Tent 1FL and the Flex Capacitor 40-60 Pack. The High Route Tent 1FL (HR1) was my brainchild and is nearly old news if you regularly read this website. A 110-unit early…

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

By Andrew Skurka / August 25, 2016 /

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…

Be the first to know: Flex Capacitor Pack updates

By Andrew Skurka / August 25, 2016 /

Several readers have asked how they can be notified when the Sierra Designs Flex Capacitor 40-60 Pack becomes available. If you want to be put on this list, too, please complete the form below. As of late-August, we’re expecting a limited run of FC packs to become available in October. They will be available directly from…

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

By Andrew Skurka / August 29, 2016 /

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…

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

By Andrew Skurka / August 31, 2016 /

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…

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

By Andrew Skurka / September 20, 2016 /

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…

New release: A pack for the future

By Andrew Skurka / September 25, 2016 /

The Sierra Designs Flex Capacitor 40-60 Pack is now available for pre-order. Expected ship date is October 4. If you are a regular reader of this blog, you’ve been hearing about the Flex Capacitor for months. If you need to get caught up, here is some recommended reading and viewing: Seven reasons it stands out…

Upcoming changes to Flex Capacitor sizing & hipbelt

By Andrew Skurka / January 17, 2017 /

Sierra Designs will receive a new shipment of its Flex Capacitor 40-60 Pack at the end of February. The pack has been well received by customers and the media, and we’re optimistic about its future. A few changes have been made to this next round of production. I’ve mentioned these changes in several places, but figured I…

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

By Andrew Skurka / February 13, 2017 /

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…

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

By Andrew Skurka / February 21, 2017 /

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…