MightyGoods > Sierra Designs > Sierra Designs Flex Capacitor

Sierra Designs Flex Capacitor Reviews and Buyer's Guide (Jan 2019)

4.52 based on 9 reviews
This bag has very few reviews, so we haven't ranked it.

Sierra Designs Flex Capacitor
100% of the Sierra Designs Flex Capacitor reviews are good or excellent!

Excellent (100%)
Good (0%)
Average (0%)
Poor (0%)
Bad (0%)

Reviews Summary

Here's what the reviewers think about the Sierra Designs Flex Capacitor:

Reviewers like these things about the Sierra Designs Flex Capacitor

  • Testers found out that the Sierra Designs Flex backpack is durable due to its nylon material.
  • Other testers pointed out that its volume could be expandable.
  • Reviewers noted that its the volume of its side pockets are adjustable.
  • Users also said that it includes a zippered stash pocket on its lid.
  • Other reviewers thought that its main compartment could be accessed through a single top zipper.
  • They also indicated that the bag consists of two waist belt pockets for added storage.
  • According to some users, the pack has a top-loading and minimalist design.
  • Other users found that it is easy and comfortable to carry.
  • According to those who used it, its rigid but lightweight frame makes it possible to carry heavy loads.
  • Many users pointed out that it has an exceptional back ventilation.
  • Testers noted that the bag was specific side pockets for water bottles.

Reviewers don't like these things

  • A tester thought that it was difficult to store wet items outside the main compartment.
  • A reviewer mentioned that its shoulder straps do not have external attachment points.

Feature Summary

Many sources mention these Sierra Designs Flex Capacitor features:
  • Hydration bladder
  • Hydration compatible

Actual features depends on the model, so check the features before you buy.

Selected Reviews

The Big Outside

For ultralighters or any backpacker seeking a sack with capacity versatility and a low weight, at a good price, the Sierra Designs Flex Capacitor 40-60 deserves a close look.

Posted 3 August 2017 by Michael Lanza - Read full review

PMags people


The Sierra Designs Flex Capacitor is a pack for those who don’t need, want or can’t have a whole quiver of packs… but does need at least a damn good one.

Posted 4 October 2016 by Paul Mags - Read full review

Gear Junkie

Overall, this is a well designed, functional, light backpack that can carry significant weight if needed. It will provide a versatile solution for hikers and others who want a backpack for many uses on high mountains and trails anywhere you may roam.

Posted 25 August 2016 by Sean McCoy - Read full review

Bag ID 33350. Images from Amazon Product Advertising API

Last updated on January 11, 2019