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Best Backpacking Water Filter of 2021

Our filtration gurus have bought and tested 70+ of the best backpacking water filters over the last 11 years. This 2021 review covers 24 of the market's latest and greatest. Taking each with us on extensive adventures, they've seen the likes of sailing adventures North of Sweden, climbing trips to Peru, running expeditions across the USA, and fastpacking adventures in Iceland. We assess portability and ease of backcountry maintenance in the field, while also investigating critical aspects like what each model removes from water and how long it takes to get a potable liter of water. Using field and objective in-house tests we offer you our insights and recommendations for any backcountry traveler.

Best Overall for Personal Use

Sawyer Squeeze

Effective against: Particulates, Bacteria, Protozoa
Weight: 5.7 oz

  • Fast flow
  • Versatile & adaptable
  • Packable & lightweight
  • Great price
  • Squeeze bags break
  • Parts are easy to lose
  • Need to consistently backwash to maintain flow rate

The Sawyer Squeeze is a time-tested, on-the-go filtration system. This lightweight option is wonderful for personal use, providing great functionality on multi-day excursions and daily adventures into the backcountry. Of the multiple Sawyer Squeeze systems, it offers the fastest flow rate, filtering one liter of water in just 40 seconds during our tests. It's also packable, easily fitting into a running pack or pocket. Use it as a squeeze filter with its accompanying bags or in-line with a hydration bladder. You can even screw it to the top of a compatible water bottle and drink directly from puddles with its complementary straw. Few contenders offer this level of versatility and portability, making it our favorite for personal use.

In our four years of experience, the provided filtration bags have broken after just three to four trips, at which point they require replacement. Consider buying a Platypus Hydration Bladder as a substitute that will last longer than the traditional bags that come with the system. We also notice that bringing the syringe for cleaning is a must to ensure the flow rate stays fast, otherwise, it'll eventually clog and slow down after just a few filtrations, even in clear water. It also comes with small parts, which are easy to lose. For day trips and personal, this lightweight option comes highly recommended, so long as you bring all its bits.

Find more information on each of the best backpacking water filters of 2021 written by Amber King & Jessica Haist here.


May 7, 2022

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Apply the Sawyer Products Premium Permethrin Insect Repellent to clothing and furniture, not skin, to keep pests away.

Chris Thomas
Best Reviews Staff


Plus, everything you need to know about DEET, picaridin, and what's best for safeguarding against ticks and mosquitoes.

Good Housekeeping
Media Mentions from Good Housekeeping


Faster and more efficient than pumping or waiting for chemical treatments, the Sawyer Squeeze System offers on-the-go hydration at a good flow. This product is long-lasting, affordable, reliable, cleanable, and very user-friendly.

Alan Dixon