Best Backpacking Water Filters: Sawyer vs Katadyn vs Platypus
Three squeeze-style hollow-fiber filters, compared on the numbers each maker publishes and checked against CDC guidance. We have not tested them.
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A hollow-fiber squeeze filter is the most common way hikers treat water from streams and lakes. All three of these filters are fine enough to remove bacteria and protozoa. That fits the CDC’s guidance that filters with an absolute pore size of 0.3 micron or smaller remove bacteria and parasites. They differ in flow, weight and what comes in the box.
Quick picks
- Fastest flowPlatypus QuickDraw FilterCheck price
- Most complete kitSawyer Squeeze Water Filter SystemCheck price
- LightestKatadyn BeFree 0.6LCheck price
Side-by-side specs
| Spec | Top pickPlatypusQuickDraw Filter | Full kitSawyerSqueeze Water Filter System | LightestKatadynBeFree 0.6L |
|---|---|---|---|
| Best for | Fastest flow and gravity setups | Finest pore size and a full kit in the box | Trail runners and fast day hikes |
| Pore size | 0.2 micron | 0.1 micron absolute | 0.1 micron |
| Flow rate | 3 L/min squeeze, 1.75 L/min gravity | — | Up to 2 L/min |
| Capacity | 1,000 L | — | 1,000 L (depends on water quality) |
| Cleaning | Shake-to-clean or backflush | Backflush with included plunger | Shake or swish, no backflush |
| Price | Check price | Check price | Check price |
Specs from each manufacturer's US product page. Bars compare each spec against the best value in this table; they are not test scores. Prices change often, so we link out instead of quoting them.
The picks
★Fastest flow
PlatypusQuickDraw Filter
Best for: Fastest flow and gravity setups
A 2.4 oz hollow-fiber filter rated up to 3 L/min squeezed or 1.75 L/min by gravity, with a 1,000 L cartridge life and an integrity check.
What we like
- Highest listed flow rate
- Integrity test shows if the filter is damaged
- Made in USA of US and imported materials
Watch out for
- Reservoir sold separately with this SKU
- Not rated for viruses or chemicals
Platypus rates the QuickDraw at up to 3 L/min with normal squeeze pressure and 1.75 L/min in a gravity setup. That is the highest flow listed here. The filter weighs 2.4 oz and fits standard 28 mm bottles. Its integrity test is the standout feature: it lets you check whether a drop or a freeze has damaged the fibers. Platypus suggests a shake-to-clean every fill and a backflush every 10 L. The pore size is 0.2 micron, larger than the other two, and still within the CDC’s 0.3-micron line for bacteria.
★Most complete kit
SawyerSqueeze Water Filter System
Best for: Finest pore size and a full kit in the box
A 3 oz, 0.1-micron absolute hollow-fiber filter sold as a kit with two pouches, a cleaning plunger, gravity tubing and inline adapters.
What we like
- Most complete kit: pouches, plunger, gravity tubing
- Fits common 28 mm bottles and hydration packs
- Lifetime limited warranty
Watch out for
- Sawyer does not list a flow rate or rated capacity on this page
- Not rated for viruses
The Squeeze has a 0.1-micron absolute membrane, and the filter alone weighs 3 oz. The kit adds two pouches, a cleaning plunger, gravity tubing and inline hydration adapters. Sawyer claims removal of 99.99999% of bacteria and 99.9999% of protozoa, and backs the filter with a lifetime limited warranty. Its product page does not list a flow rate or a rated capacity.
★Lightest
KatadynBeFree 0.6L
Best for: Trail runners and fast day hikes
A 59 g soft-flask filter with a 0.1-micron hollow-fiber membrane, up to 2 L/min output and a rated life of 1,000 L.
What we like
- Lightest here at 59 g with flask
- Cleans by shaking, no tools
- Packs into a vest or shorts pocket
Watch out for
- Small 0.6 L flask
- Katadyn lists it for clear water
The BeFree weighs 59 g with its 0.6 L soft flask, so it fits a running vest. Katadyn lists up to 2 L/min and 1,000 L of life, and a 0.1-micron pore size. You clean it by shaking or swishing it in water, with no backflush. The small flask is the limit: you will refill often on a dry trail.
How to choose
- Group trips or camp water: QuickDraw for its gravity flow, or the Squeeze kit with its tubing.
- Trail running and fast day hikes: BeFree.
- Cold nights: keep any hollow-fiber filter from freezing. Our filter care guide covers this.
Not sure a filter is enough for your water source? Read how to treat water in the backcountry.
Frequently asked questions
Do these filters remove viruses?
No. The CDC says a filter with an absolute pore size of 0.3 micron or smaller removes bacteria and parasites but not viruses. Platypus states the QuickDraw is not effective against viruses. To deal with viruses, the CDC suggests disinfecting filtered water or boiling it.
Which filter is fastest?
Platypus lists up to 3 L/min squeezed. Katadyn lists up to 2 L/min for the BeFree. Sawyer does not list a flow rate on its Squeeze product page.
How long do the cartridges last?
Katadyn and Platypus both rate theirs at 1,000 L, depending on water quality. Sawyer backs the Squeeze with a lifetime limited warranty and does not list a capacity on its product page.
