Be the first to know: Flex Capacitor Pack updates

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 Sierra Designs only. Full distribution will start in Spring 2017.

Posted in on August 25, 2016


  1. Nate on August 31, 2016 at 11:38 pm

    Any chance these will appear at mec in Canada? We’re in a drought of backpacks up here

    • Andrew Skurka on September 1, 2016 at 6:46 am

      We hope so, but I don’t know about MEC’s order for spring 2017. If you’re really motivated, you could give them a call and request it. When stores hear from customers about wanting a particular product, they usually will at least give it a look.

  2. Michael Fiala on September 19, 2016 at 3:36 am

    I would like to know when this will be released?
    I’m also interested in how weatherproof this is, is it water resistant?

    • Andrew Skurka on September 19, 2016 at 8:24 am

      It will be available on October 1.

      The pack fabric is waterproof, as it is coated. However, the seams are not sealed, and there are several zippers near the top of the pack that would allow water in during a drenching storm. For all but a few backpacks, this is the case. I recommend using a plastic trash compactor bag (or two; 20-gallon Brute bags) to line the inside of your pack and keep the contents dry.

Leave a Comment